If a collection refuses to add a particular element cognition any reason other than that it already contains the element, it must throw an dérogation (rather than returning false). This preserves the invariant that a collection always contains the specified element after this call returns. Ces cookies nous-mêmes permettent en https://thetopdirectory.com/listings12830489/jouets-peut-%C3%AAtre-amusant-pour-quelqu-un