Man pages matching name x11::protocol::grabserver in section 3pm:

X11::Protocol::GrabServer.3pm.en	debian 10 / libx11-protocol-other-perl
X11::Protocol::GrabServer.3pm.en	debian 11 / libx11-protocol-other-perl
X11::Protocol::GrabServer.3pm.en	debian 12 / libx11-protocol-other-perl