public QueryRequest addParameter(String key, Object value) {
        if (parameters.get(key) == null) {
            parameters.put(key, Sets.newHashSet(value));
        } else {
            parameters.get(key).add(value);
        }
        return this;
    }
public QueryRequest addParameter ( String key , Object value ) { if ( parameters . get ( key ) == null ) { parameters . put ( key , Sets . newHashSet ( value ) ) ; } else { parameters . get ( key ) . add ( value ) ; } return this ; }
Adds a parameter to this request.