Angular - FormBuilder

Angular formbuilder group – binding to select dropdown whose values are Objects

lessonForm = this.formBuilder.group ( {
  id: ['', [Validators.required,]],
  semester: [new Semester(0,'','','',false), []],  
  course: [, [Validators.required,]],
  lessonNum: ['', [
    Validators.required,
    Validators.maxLength(32),
     ]],
  enrollmentStatusCode: [, []],
  instructor: [, []],
  lessonStartDate: ['', []],
  lessonEndDate: ['', []],
  maxStudentsToEnroll: ['', []],
})