Interface TSMappedType

interface TSMappedType {
    constraint: TSType | null;
    end: number;
    key: BindingIdentifier;
    nameType: TSType | null;
    optional: false | TSMappedTypeModifierOperator;
    parent?: Node;
    range?: [number, number];
    readonly: TSMappedTypeModifierOperator | null;
    start: number;
    type: "TSMappedType";
    typeAnnotation: TSType | null;
}