class SampleNull3 {
    // class variables
    private null;
}

// class properties
class SampleNull4 {
    private var;
    set null(value) {}
    get null() {
        return this.var;
    }
}

class SampleNull5 {
    null() {} // class methods
}

// interface declarations
interface SampleNull6 {
    null: any;
}