+ /**
+ *
+ * Returns identifier of this node in parent map node
+ *
+ * Contents of identifier is defined by <code>key</code> (
+ * {@link org.opendaylight.yangtools.yang.model.api.ListSchemaNode#getKeyDefinition()}
+ * ) statement in YANG schema for associated list item and child {@link LeafNode}s
+ * values with {@link org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier}
+ * as defined in the schema.
+ *
+ * @return identifier of this node in the context of parent node
+ */