TintableCompoundButton  
    Interface which allows a android.widget.CompoundButton to receive tinting calls from CompoundButtonCompat when running on API v20 devices or lower.
Functions
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                  Returns the tint applied to the button drawable
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                  Returns the blending mode used to apply the tint to the button drawable
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                  Applies a tint to the button drawable.
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                  Specifies the blending mode which should be used to apply the tint specified by setSupportButtonTintList to the button drawable.