partial void Updatea_presentation_session(a_presentation_session instance);
partial void Deletea_presentation_session(a_presentation_session instance);
partial void Inserta_presentation_session(a_presentation_session instance);
partial void Updatea_presentation_session(a_presentation_session instance);
partial void Deletea_presentation_session(a_presentation_session instance);
partial void Inserta_presentation_session(a_presentation_session instance);