code: private void obtainDialogHeaderIconTintList(@NonNull final TypedArray typedArray) {
          setDialogHeaderIconTintList(
                  typedArray.getColorStateList(R.styleable.DialogPreference_dialogHeaderIconTint));
      }
docs: Obtains the color state list, which is used to tint the icon of the header of the
  preference's dialog, from a specific typed array.
  
  @param typedArray
  The typed array, the color state list should be obtained from, as an instance of the
  type {@link TypedArray}. The typed array may not be null