*/
function getField ($fieldName);
+ /**
+ * Checks if given field is set
+ *
+ * @param $fieldName Field name to check
+ * @return $isSet Whether the given field name is set
+ * @throws NullPointerException If the result instance is null
+ */
+ function isFieldSet ($fieldName);
+
/**
* Checks whether an object equals this object. You should overwrite this
* method to implement own equality checks