assemblyscript/tests/compiler/external.ts

export declare function foo(): void; // external , foo
export declare namespace foo {
  export function bar(): void; // external , foo.bar
}

@external("bar")
export declare function two(): void; // external , bar

@external("foo", "baz")
export declare function three(): void; // foo , baz

@external("foo", "var") // foo , var
export declare const var_: i32;