The PathAliasImporter is a replacement for the fileystem importer. Relative import paths
are first checked to see if they match an existing file relative to the from identifier (when provided).
Then if the relative import path has a first segment that is any of the aliases provided the path
will be made absolute using that alias's path location. Finally any relative path is resolved against
the rootDir specified from {CssBlockOptionsReadonly}.
When debugging an identifier it is made relative to an alias, if one exists, where the identifier is
within an aliased directory. If several such aliased paths exist, the most specific alias will be used.
The PathAliasImporter is a replacement for the fileystem importer. Relative import paths are first checked to see if they match an existing file relative to the from identifier (when provided). Then if the relative import path has a first segment that is any of the aliases provided the path will be made absolute using that alias's path location. Finally any relative path is resolved against the rootDir specified from {CssBlockOptionsReadonly}.
When debugging an identifier it is made relative to an alias, if one exists, where the identifier is within an aliased directory. If several such aliased paths exist, the most specific alias will be used.