A function model represents the model of a Ceylon function that you can invoke and inspect.

A function is a toplevel binding, declared on a package.

This is a FunctionModel that you can also invoke:

shared String foo(String name) => "Hello "+name;

void test(){
    Function<String,[String]> f = `foo`;
    // This will print: Hello Stef
    print(f("Stef"));
}