parameters: (self, link, package_name)
docstring: Returns a link to a cached item if it exists, otherwise returns the
          passed link.
docstring_summary: Returns a link to a cached item if it exists, otherwise returns the
          passed link.
docstring_tokens: Returns a link to a cached item if it exists otherwise returns the passed link .
function: def get(self, link, package_name):
          # type: (Link, Optional[str]) -> Link
          """Returns a link to a cached item if it exists, otherwise returns the
          passed link.
          """
          raise NotImplementedError()
function_tokens: def get ( self , link , package_name ) : # type: (Link, Optional[str]) -> Link raise NotImplementedError ( )