+ <attr name="spinnerHeaderTextColor" format="reference" />
+ <attr name="spinnerBackground" format="reference" />
+ <attr name="spinnerTextColorSelector" format="reference" />
+ <attr name="appbarSpinnerTextColorSelector" format="reference" />
+ <attr name="buttonTextColorSelector" format="reference" />
+ <attr name="buttonBackgroundColorSelector" format="reference" />