Function AEInstallCoercionHandler 

pub unsafe extern "C-unwind" fn AEInstallCoercionHandler(
    from_type: DescType,
    to_type: DescType,
    handler: AECoercionHandlerUPP,
    handler_refcon: *mut c_void,
    from_type_is_desc: bool,
    is_sys_handler: bool,
) -> i16

Available on crate feature AEDataModel only.

Safety

• handler must be implemented correctly.
• handler_refcon must be a valid pointer.