Function source_is_remappable 

pub fn source_is_remappable(device: Option<&EventDevice>) -> bool

Whether the OS hook may suppress/remap a button event from this source.

Fail-closed on macOS-style attribution: only a known Logitech non-trackpad source is remappable. Unknown / non-Logitech / trackpad sources always pass through so a wedged remap policy can never brick the system pointer.