 we can use 'insert()' 
    // 
    
    </span><span class=identifier>ba</span><span class=special>::</span><span class=identifier>insert</span><span class=special>( </span><span class=identifier>eset </span><span class=special>)(</span><span class=number>4</span><span class=special>,</span><span class=string>&quot;Kurt&quot;</span><span class=special>,</span><span class=number>55</span><span class=special>)(</span><span class=number>5</span><span class=special>,</span><span class=string>&quot;Bjarne&quot;