CellArea.isFocusSibling

bool isFocusSibling(gtk.cell_renderer.CellRenderer renderer, gtk.cell_renderer.CellRenderer sibling)

Returns whether sibling is one of renderer’s focus siblings (see [gtk.cell_area.CellArea.addFocusSibling]).

`renderer`	the [gtk.cell_renderer.CellRenderer] expected to have focus
`sibling`	the [gtk.cell_renderer.CellRenderer] to check against renderer’s sibling list

true if sibling is a focus sibling of renderer