deprecation: Whether this is a deprecation warning.
deprecationType: The type of deprecation. Only set if deprecation is
true.
span: The location in the Sass source code that generated this warning.
This may be unset if the warning didn't come from Sass source, for
example if it's from a deprecated JavaScript option.
stack: The Sass stack trace at the point the warning was issued. This may
be unset if the warning didn't come from Sass source, for example if it's
from a deprecated JavaScript option.
The options passed to Logger.warn.
deprecation: Whether this is a deprecation warning.deprecationType: The type of deprecation. Only set ifdeprecationis true.span: The location in the Sass source code that generated this warning. This may be unset if the warning didn't come from Sass source, for example if it's from a deprecated JavaScript option.stack: The Sass stack trace at the point the warning was issued. This may be unset if the warning didn't come from Sass source, for example if it's from a deprecated JavaScript option.