class Sass::CanonicalizeContext

@see sass-lang.com/documentation/js-api/interfaces/canonicalizecontext/
Not all importers will need this information to resolve loads, but some may find it useful.
Contextual information passed to ‘canonicalize` and `find_file_url`.

def containing_url

Returns:
  • (String, nil) - 
def containing_url
  @containing_url_unused = false
  @containing_url
end

def initialize(canonicalize_request)

@!visibility private 
def initialize(canonicalize_request)
  @containing_url_unused = true
  @containing_url = canonicalize_request.containing_url == '' ? nil : canonicalize_request.containing_url
  @from_import = canonicalize_request.from_import
end