You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/dart-sys/examples/primitives/src
    
    the code of the file until where you have to start completion: extern crate dart_sys;

/// Returns a random number between 0 and 255 as an unsigned 8-bit integer by using an external
/// crate.
#[no_mangle]
pub extern "C" fn random_
    
pub unsafe extern "C" fn multiply(a: i32, b: i32) -> *mut i32 {
	// Allocate memory in rust
	let mult = std::alloc::alloc(std::alloc::Layout::new::<i32>()) as *mut i32;
	// Write to memory
	*mult = a * b;
	mult
}