@Px abstract fun getDividerSize(grid: Grid, divider: Divider, dividerDrawable: Drawable): Int
Gets the divider's size. The size of an horizontal divider is its height. The size of a vertical divider is its width.
grid - the Grid in which the divider is shown.
divider - the Divider which will have the returned size.
dividerDrawable - the divider's Drawable.
Return
the size in pixels of the given divider.