externalDependencies

struct Caller
{
    @ExternalDependency("someTool")
    void callSomeTool(in string parameter)
    {
        // calls `someTool`
    }

    @ExternalDependency("otherTool")
    void callOtherTool(in string parameter)
    {
        // calls `otherTool`
    }
}

static assert(externalDependencies!Caller == [
    ExternalDependency("otherTool"),
    ExternalDependency("someTool"),
]);