Function gdk4_sys::gdk_popup_layout_set_shadow_width

pub unsafe extern "C" fn gdk_popup_layout_set_shadow_width(
    layout: *mut GdkPopupLayout,
    left: c_int,
    right: c_int,
    top: c_int,
    bottom: c_int
)

Available on crate feature v4_2 only.