static boolean contains(CodeSigner[] set, CodeSigner signer)
    {
        for (int i = 0; i < set.length; i++) {
            if (set[i].equals(signer))
                return true;
        }
        return false;
    }
static boolean contains ( CodeSigner [ ] set , CodeSigner signer ) { for ( int i = 0 ; i < set . length ; i ++ ) { if ( set [ i ] . equals ( signer ) ) return true ; } return false ; }
returns true if set contains signer