parameters: (self, node)
return_statement: return getattr(self, method, None)
docstring: Return the visitor function for this node or `None` if no visitor
          exists for this node.  In that case the generic visit function is
          used instead.
docstring_summary: Return the visitor function for this node or `None` if no visitor
          exists for this node.  In that case the generic visit function is
          used instead.
docstring_tokens: Return the visitor function for this node or None if no visitor exists for this node . In that case the generic visit function is used instead .
function: def get_visitor(self, node):
          """Return the visitor function for this node or `None` if no visitor
          exists for this node.  In that case the generic visit function is
          used instead.
          """
          method = 'visit_' + node.__class__.__name__
          return getattr(self, method, None)
function_tokens: def get_visitor ( self , node ) : method = 'visit_' + node . __class__ . __name__ return getattr ( self , method , None )