docs: def render_to_string(template, object, params=None):
      """
      ``object`` will be converted to xml using :func:`easymode.tree.xml`. The resulting xml 
      will be transformed using ``template``.
      The result is a unicode string containing the transformed xml.
      
      :param template: an xslt template name.
      :param object: an object that has an ``__xml__`` method. (See :func:`easymode.tree.xml.decorators.toxml`).
      :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)
      xml = xmltree.xml(object)
      
      result = transform(xml, str(xsl_path), params)
      return result