def METHOD_NAME(self, node, extras):
    """
        Default recognition processing.
        This is the method which should be overridden in most cases
        to provide derived classes with custom recognition
        processing functionality.
        This default processing method does nothing.
        - *node* -- The root node of the recognition parse tree.
        - *extras* -- A dictionary of all elements from the
          extras list contained within this recognition.
          Maps element name -> element value.
    """