parameters: (self, headers)
docstring: Used by Key subclasses to do additional, provider-specific
          processing of response headers. No-op for this base class.
docstring_summary: Used by Key subclasses to do additional, provider-specific
          processing of response headers. No-op for this base class.
docstring_tokens: Used by Key subclasses to do additional provider - specific processing of response headers . No - op for this base class .
function: def handle_addl_headers(self, headers):
          """
          Used by Key subclasses to do additional, provider-specific
          processing of response headers. No-op for this base class.
          """
          pass
function_tokens: def handle_addl_headers ( self , headers ) : pass