pub unsafe extern "C" fn jl_call(
f: *mut jl_function_t,
args: *mut *mut jl_value_t,
nargs: u32
) -> *mut jl_value_t
pub unsafe extern "C" fn jl_call(
f: *mut jl_function_t,
args: *mut *mut jl_value_t,
nargs: u32
) -> *mut jl_value_t