[FEAT] Use namespaces attribute as property

With ce164aa7d14f3ca7baf437e0523d7e2627fbe1f3 the namespaces attribute
became a property which is used in this change.

Change-Id: I11b1564f48a26f0f15cd5ba6f69f66e35e25c723
Merge "[FEAT] Use namespaces attribute as property"