code: function (crop) {
              if (crop instanceof IMSoftcrop.Softcrop !== true) {
                  return;
              }
  
              var div = document.getElementById(this._image.id + '_' + crop.id);
              var divs = this._previewContainer.getElementsByClassName('imc_preview_image_container');
              for (var n = 0; n < divs.length; n++) {
                  divs[n].classList.remove('active');
              }
  
              div.classList.add('active');
  
              this._crop = crop;
              this._image.setActiveCrop(crop);
              this._cropLockedToggle.on = crop.locked;
              this._cropUsableToggle.on = crop.usable;
              this.redraw();
              this.updateImageInfo(true);
          }
docs: Set active crop
  @param crop