Function pgx_pg_sys::FuncnameGetCandidates

pub unsafe fn FuncnameGetCandidates(
    arg_names: *mut List, 
    arg_nargs: c_int, 
    arg_argnames: *mut List, 
    arg_expand_variadic: bool, 
    arg_expand_defaults: bool, 
    arg_missing_ok: bool
) -> FuncCandidateList