public void setUsernames(java.util.Collection<String> usernames) {
        if (usernames == null) {
            this.usernames = null;
            return;
        }

        this.usernames = new java.util.ArrayList<String>(usernames);
    }
public void setUsernames ( java . util . Collection < String > usernames ) { if ( usernames == null ) { this . usernames = null ; return ; } this . usernames = new java . util . ArrayList < String > ( usernames ) ; }
<p>
A list of user names.
</p>

@param usernames
A list of user names.