def all_props(self):
        """Return a dictionary with the values of all children, and place holders for all of the section
        argumemts. It combines props and arg_props"""

        d = self.arg_props
        d.update(self.props)

        return d
Return a dictionary with the values of all children, and place holders for all of the section
        argumemts. It combines props and arg_props