XNU to iOS/OSX KernelCache Import

[turnerrocks1]

So when taking a function such as undefined8 ipc_object_insert_send_right (undefined,undefined,undefined);
I go to the data types of ghidra and see that ipc_space_t and kern_return_t types are defined automatically in ghidra but it doesn't seem to be supplied. Luckily Most of the Kernel itself is open-sourced by apple under xnu. Looking at the source code the right definition for that would be kern_return_t ipc_object_insert_send_right(ipc_space_t space, mach_port_name_t name, mach_msg_type_name_t msgt_name);. Which is weird in my opinion as using ida 7.6 pro it seems to automatically fill in the type for the variables. Can you make a feature that allows importation of said XNU Source code. I see there is already a feature for parsing C source to programs but it doesn't seem to work with importing xnu source files.