code: private void initialize(@Nullable final AttributeSet attributeSet,
                              @AttrRes final int defaultStyle,
                              @StyleRes final int defaultStyleResource) {
          obtainStyledAttributes(attributeSet, defaultStyle, defaultStyleResource);
          previewLoader =
                  new ColorPreviewDataBinder(getContext(), getPreviewBackground(), getPreviewShape(),
                          getPreviewSize(), getPreviewBorderWidth(), getPreviewBorderColor());
      }
docs: Initializes the preference.
  
  @param attributeSet
  The attribute set, the attributes should be obtained from, as an instance of the type
  {@link AttributeSet} or null, if no attributes should be obtained
  @param defaultStyle
  The default style to apply to this preference. If 0, no style will be applied (beyond
  what is included in the theme). This may either be an attribute resource, whose value
  will be retrieved from the current theme, or an explicit style resource
  @param defaultStyleResource
  A resource identifier of a style resource that supplies default values for the
  preference, used only if the default style is 0 or can not be found in the theme. Can
  be 0 to not look for defaults