Returns whether the specified stimlus type is a component in this stimulus

        :param stimtype: :class:`AbstractStimulusComponent<sparkle.stim.abstract_component.AbstractStimulusComponent>` subclass class name to test for membership in the components of this stimulus
        :type stimtype: str
        :returns: bool -- if the stimtype is in the model

def contains(self, stimtype):
        """Returns whether the specified stimlus type is a component in this stimulus

        :param stimtype: :class:`AbstractStimulusComponent<sparkle.stim.abstract_component.AbstractStimulusComponent>` subclass class name to test for membership in the components of this stimulus
        :type stimtype: str
        :returns: bool -- if the stimtype is in the model
        """
        for track in self._segments:
            for component in track:
                if component.__class__.__name__ == stimtype:
                    return True
        return False