def render_xml_to_string(template, input, params=None):
    """
    Transforms ``input`` using ``template``, which should be an xslt.
    
    :param template: an xslt template name.
    :param input: an string that contains xml
    :param params: A dictionary containing xslt parameters. Use :func:`~easymode.xslt.prepare_string_param`\
        on strings you want to pass in.
    :rtype: :class:`unicode`
    """
    xsl_path = find_template_path(template)

    result = transform(input, str(xsl_path), params)  
    return result
Transforms ``input`` using ``template``, which should be an xslt.
    
    :param template: an xslt template name.
    :param input: an string that contains xml
    :param params: A dictionary containing xslt parameters. Use :func:`~easymode.xslt.prepare_string_param`\
        on strings you want to pass in.
    :rtype: :class:`unicode`