code: public final void setPreviewShape(@NonNull final PreviewShape previewShape) {
          Condition.INSTANCE.ensureNotNull(previewShape, "The preview shape may not be null");
          this.previewShape = previewShape;
  
          if (previewLoader != null) {
              previewLoader.setShape(previewShape);
          }
  
          adaptPreviewView();
      }
docs: Sets the shape of the preview of the preference's color.
  
  @param previewShape
  The shape, which should be set, as a value of the enum {@link PreviewShape}. The
  shape may not be null