public float getDrawerElevation() {
        if (SET_DRAWER_SHADOW_FROM_ELEVATION) {
            return mDrawerElevation;
        }
        return 0f;
    }
The base elevation of the drawer(s) relative to the parent, in pixels. Note that the
elevation change is only supported in API 21 and above. For unsupported API levels, 0 will
be returned as the elevation.

@return The base depth position of the view, in pixels.
app/src/main/java/com/sunnyweather/android/ui/customerUIs/HomeDrawerLayout.java