public LessonPlan SaveLessonPLan(LessonPlanCreationDTO createDTO) { LessonPlan lessonPlan = CreateLessonPLan(createDTO); if (lessonPlan == null) { return(null); } themeManager.ConnectEntity(createDTO.themes, lessonPlan.LessonPlanId, "Lesson Plan"); bool ConnectionsCreateResult = CreateConnections(createDTO.documentIds, lessonPlan); if (ConnectionsCreateResult == false) { return(null); } return(lessonPlan); }