parameters: ()
return_statement: return Leaf(token.DOT, u".")
docstring: A period (.) leaf
docstring_summary: A period (.) leaf
docstring_tokens: A period ( . ) leaf
function: def Dot():
      """A period (.) leaf"""
      return Leaf(token.DOT, u".")
function_tokens: def Dot ( ) : return Leaf ( token . DOT , u"." )