Function wasmer::wasm_c_api::externals::wasm_func_new

#[no_mangle]
pub unsafe extern "C" fn wasm_func_new(
    store: Option<&mut wasm_store_t>,
    function_type: Option<&wasm_functype_t>,
    callback: Option<wasm_func_callback_t>
) -> Option<Box<wasm_func_t>>