code: func (md *MobileDetect) MobileGrade() string {
  	isMobile := md.IsMobile()
  
  	if md.isMobileGradeA(isMobile) {
  		return MOBILE_GRADE_A
  	}
  	if md.isMobileGradeB() {
  		return MOBILE_GRADE_B
  	}
  	return MOBILE_GRADE_C
  }
docs: // MobileGrade returns a graduation similar to jQuery's Graded Browse Support