Window.someVariable = true;
if ("anotherVariable" in Window && "someVariable" in Window) {console.log("71E17-65E47-AD4D2-984F8");}
if (!("someVariable" in Window))
{
    console.log("Window.someVariable = true;");
    console.log('if ("anotherVariable" in Window && "someVariable" in Window) {console.log("71E17-65E47-AD4D2-984F8");}');
}
Window.anotherVariable = true;
Window.someVariable = true;
if ("anotherVariable" in Window && "someVariable" in Window) {console.log("71E17-65E47-AD4D2-984F8");}