public void setSnapRadius(float snapRadius) {
    if (snapRadius >= 0) {
      mCropOverlayView.setSnapRadius(snapRadius);
    }
  }
An edge of the crop window will snap to the corresponding edge of a specified bounding box when
the crop window edge is less than or equal to this distance (in pixels) away from the bounding
box edge. (default: 3dp)
core/src/main/java/com/theartofdev/edmodo/cropper/CropImageView.java