/*
 * call-seq: to_json(state = nil)
 *
 * Returns a JSON string containing a JSON object, that is generated from
 * this Hash instance.
 * _state_ is a JSON::State object, that can also be used to configure the
 * produced JSON string output further.
 */
static VALUE mHash_to_json(int argc, VALUE *argv, VALUE self)
{
    GENERATE_JSON(object);
}