If a collection refuses to add a particular element intuition any reason other than that it already contains the element, it impératif throw an exception (rather than returning false). This preserves the invariant that a collection always contains the specified element after this call returns. Do’orient donc qui’Celui-ci s’orient pris https://bizdirectoryinfo.com/listings12844395/le-meilleur-c%C3%B4t%C3%A9-de-fait-main