Interface Visitor<C>

interface Visitor<C extends CustomAtRules> {
    Declaration?: DeclarationVisitor<Declaration> | DeclarationVisitors;
    DeclarationExit?: DeclarationVisitor<Declaration> | DeclarationVisitors;
    EnvironmentVariable?:
        | EnvironmentVariableVisitor
        | EnvironmentVariableVisitors;
    EnvironmentVariableExit?: | EnvironmentVariableVisitor
    | EnvironmentVariableVisitors;
    Function?: FunctionVisitor
    | { [name: string]: FunctionVisitor };
    FunctionExit?: FunctionVisitor | { [name: string]: FunctionVisitor };
    Rule?:
        | RuleVisitor<
            | { type: "ignored" }
            | { type: "custom"; value: null }
            | { type: "font-face"; value: FontFaceRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "font-palette-values"; value: FontPaletteValuesRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "font-feature-values"; value: FontFeatureValuesRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "namespace"; value: NamespaceRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "layer-statement"; value: LayerStatementRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "property"; value: PropertyRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "view-transition"; value: ViewTransitionRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "unknown"; value: UnknownAtRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "media"; value: MediaRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "import"; value: ImportRule<MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "style"; value: StyleRule<Declaration, MediaQuery> } & {
                value: Required<StyleRule<Declaration, MediaQuery>> & {
                    declarations: Required<DeclarationBlock>;
                };
            }
            | { type: "keyframes"; value: KeyframesRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "page"; value: PageRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "supports"; value: SupportsRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "counter-style"; value: CounterStyleRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | {
                type: "moz-document";
                value: MozDocumentRule<Declaration, MediaQuery>;
            } & { value: Required<Rule["value"]> }
            | { type: "nesting"; value: NestingRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | {
                type: "nested-declarations";
                value: NestedDeclarationsRule<Declaration>;
            } & { value: Required<Rule["value"]> }
            | { type: "viewport"; value: ViewportRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "custom-media"; value: CustomMediaRule<MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "layer-block"; value: LayerBlockRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "container"; value: ContainerRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "scope"; value: ScopeRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | {
                type: "starting-style";
                value: StartingStyleRule<Declaration, MediaQuery>;
            } & { value: Required<Rule["value"]> },
        >
        | RuleVisitors<C>;
    RuleExit?:
        | RuleVisitor<
            | { type: "ignored" }
            | { type: "custom"; value: null }
            | { type: "font-face"; value: FontFaceRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "font-palette-values"; value: FontPaletteValuesRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "font-feature-values"; value: FontFeatureValuesRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "namespace"; value: NamespaceRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "layer-statement"; value: LayerStatementRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "property"; value: PropertyRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "view-transition"; value: ViewTransitionRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "unknown"; value: UnknownAtRule } & {
                value: Required<Rule["value"]>;
            }
            | { type: "media"; value: MediaRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "import"; value: ImportRule<MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "style"; value: StyleRule<Declaration, MediaQuery> } & {
                value: Required<StyleRule<Declaration, MediaQuery>> & {
                    declarations: Required<DeclarationBlock>;
                };
            }
            | { type: "keyframes"; value: KeyframesRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "page"; value: PageRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "supports"; value: SupportsRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "counter-style"; value: CounterStyleRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | {
                type: "moz-document";
                value: MozDocumentRule<Declaration, MediaQuery>;
            } & { value: Required<Rule["value"]> }
            | { type: "nesting"; value: NestingRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | {
                type: "nested-declarations";
                value: NestedDeclarationsRule<Declaration>;
            } & { value: Required<Rule["value"]> }
            | { type: "viewport"; value: ViewportRule<Declaration> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "custom-media"; value: CustomMediaRule<MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "layer-block"; value: LayerBlockRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "container"; value: ContainerRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | { type: "scope"; value: ScopeRule<Declaration, MediaQuery> } & {
                value: Required<Rule["value"]>;
            }
            | {
                type: "starting-style";
                value: StartingStyleRule<Declaration, MediaQuery>;
            } & { value: Required<Rule["value"]> },
        >
        | RuleVisitors<C>;
    Token?: TokenVisitor | TokenVisitors;
    Angle?(angle: Angle): void | Angle;
    Color?(color: CssColor): void | CssColor;
    CustomIdent?(ident: string): string | void;
    DashedIdent?(ident: string): string | void;
    Image?(image: Image): void | Image;
    ImageExit?(image: Image): void | Image;
    Length?(length: LengthValue): void | LengthValue;
    MediaQuery?(
        query: MediaQuery,
    ): void | ReturnedMediaQuery | ReturnedMediaQuery[];
    MediaQueryExit?(
        query: MediaQuery,
    ): void | ReturnedMediaQuery | ReturnedMediaQuery[];
    Ratio?(ratio: Ratio): void | Ratio;
    Resolution?(resolution: Resolution): void | Resolution;
    Selector?(selector: Selector): void | Selector | Selector[];
    StyleSheet?(
        stylesheet: StyleSheet,
    ): void | StyleSheet<ReturnedDeclaration, ReturnedMediaQuery>;
    StyleSheetExit?(
        stylesheet: StyleSheet,
    ): void | StyleSheet<ReturnedDeclaration, ReturnedMediaQuery>;
    SupportsCondition?(condition: SupportsCondition): SupportsCondition;
    SupportsConditionExit?(condition: SupportsCondition): SupportsCondition;
    Time?(time: Time): void | Time;
    Url?(url: Url): void | Url;
    Variable?(variable: Variable): TokenReturnValue;
    VariableExit?(variable: Variable): TokenReturnValue;
}