Question

An ObjectLikeSequence object represents a sequence of key/value pairs.

The initial sequence you get by wrapping an object with Lazy(object) is an ObjectLikeSequence.

All methods of ObjectLikeSequence that conceptually should return something like an object return another ObjectLikeSequence.

Examples

var obj = { foo: 'bar' };

Lazy(obj).assign({ bar: 'baz' })   // instanceof Lazy.ObjectLikeSequence
Lazy(obj).defaults({ bar: 'baz' }) // instanceof Lazy.ObjectLikeSequence
Lazy(obj).invert()                 // instanceof Lazy.ObjectLikeSequence