Function wasmtime_linker_define 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn wasmtime_linker_define(
    linker: &mut wasmtime_linker_t,
    store: WasmtimeStoreContext<'_>,
    module: *const u8,
    module_len: usize,
    name: *const u8,
    name_len: usize,
    item: &wasmtime_extern_t,
) -> Option<Box<wasmtime_error_t>>