typs.js
// checks if obj is null, undefined or NaN
checks if obj is null, undefined or NaN
checks if obj is null undefined or NaN
nil () {
		return this.add((obj) => {
			return obj === null || obj === void 0 || obj !== obj;
		});
	}
nil ( ) { return this . add ( ( obj ) => { return obj === null || obj === void 0 || obj !== obj ; } ) ; }
checks if obj is null, undefined or NaN
checks if obj is null undefined or NaN