Method fetchForClassroom

app/collections/Levels.js:24–28

(classroomID, options)

    }

    fetchForClassroom (classroomID, options) {
      if (options == null) { options = {} }
      options.url = `/db/classroom/${classroomID}/levels`
      return this.fetch(options)
    }

    fetchForClassroomAndCourse (classroomID, courseID, options) {
      if (options == null) { options = {} }