Custom data names for reference extensions. am: ceb4a59409 am: c72ec756c2 am: a890553c51
am: 03d6d05559

* commit '03d6d05559bb9b9ea5e4192828296bc4a7faabef':
  Custom data names for reference extensions.

Change-Id: I07766b7409fcce332945ddb02323b45268af6508