What was the relationship between Sai Baba and Tatya Patil like, especially during the Chavadi procession?

The source describes a very close and loving relationship. Tatya affectionately called Baba 'Mama'. Their bond was so strong that during the Chavadi procession, even if Baba was ready to go, He would wait for Tatya Patil to arrive. As described in Chapter 37, Tatya would then place his hand under Baba's arm to help Him stand up. Tatya also had the honor of placing a beautiful golden-bordered shawl over Baba and adjusting it on His head. During the walk to the Chavadi, Tatyaba would hold Baba's left hand, demonstrating their deep mutual love and a bond for which there was no comparison.