original_docstring: 
          Adds a new document to the metrics store
  
          :param doc: The new document.
          
docstring: Adds a new document to the metrics store
docstring_tokens: Adds a new document to the metrics store
code: def _add(self, doc):
          """
          Adds a new document to the metrics store
  
          :param doc: The new document.
          """
          raise NotImplementedError("abstract method")
code_tokens: def _add ( self , doc ) : raise NotImplementedError ( "abstract method" )
short_docstring: Adds a new document to the metrics store
short_docstring_tokens: Adds a new document to the metrics store
comment: """
          Adds a new document to the metrics store
  
          :param doc: The new document.
          """