 if the response has not been committed yet. It also sets the response's character
 encoding appropriately for the locale, if the character encoding has not been explicitly set using
 <a href="#setContentType(java.lang.String)"><code>setContentType(java.lang.String)</code></a>, <a href="#setCharacterEncoding(java.lang.String)"><code>setCharacterEncoding(String)</code></a> or <a href="#setCharacterEncoding(java.nio.charset.Charset)"><code>setCharacterEncoding(Charset)</code></a>,
 <code>getWriter</code> hasn