Function extend

extend<TObject, TSource>(object: TObject, source: TSource): TObject & TSource

extend<TObject, TSource1, TSource2>(
    object: TObject,
    source1: TSource1,
    source2: TSource2,
): TObject & TSource1 & TSource2

extend<TObject, TSource1, TSource2, TSource3>(
    object: TObject,
    source1: TSource1,
    source2: TSource2,
    source3: TSource3,
): TObject & TSource1 & TSource2 & TSource3

extend<TObject, TSource1, TSource2, TSource3, TSource4>(
    object: TObject,
    source1: TSource1,
    source2: TSource2,
    source3: TSource3,
    source4: TSource4,
): TObject & TSource1 & TSource2 & TSource3 & TSource4

extend<TObject>(object: TObject): TObject

extend<TResult>(object: any, ...otherArgs: any[]): TResult