menu check {
    -gtk-icon-source: url("assets/check-menuitem-unselected.png");
}

menu radio {
    -gtk-icon-source: url("assets/check-menuitem-unselected.png");
}

menu check:checked {
    -gtk-icon-source: url("assets/check-menuitem-dark.png");
}

menu check:checked:disabled {
    -gtk-icon-source: url("assets/check-menuitem-insensitive-dark.png");
}

menu radio:checked {
    -gtk-icon-source: url("assets/radio-menuitem-dark.png");
}

menu radio:checked:disabled {
    -gtk-icon-source: url("assets/radio-menuitem-insensitive-dark.png");
}