pub(crate) fn handle_call_hierarchy_incoming(
snap: GlobalStateSnapshot,
params: CallHierarchyIncomingCallsParams,
) -> Result<Option<Vec<CallHierarchyIncomingCall>>>pub(crate) fn handle_call_hierarchy_incoming(
snap: GlobalStateSnapshot,
params: CallHierarchyIncomingCallsParams,
) -> Result<Option<Vec<CallHierarchyIncomingCall>>>