Add more comments that explain example & usage

Change-Id: I3389554dfbe67aeb8c22a78b1929798988e57bc0
Add more comments that explain example & usage

Change-Id: I049b47e56d7f859c9b339d4557d4d292b33f2f74
Add more comments that explain example & usage

Change-Id: I4665cda50c2bbc8e0e323efb1baff653ace12579
Merge "Add more comments that explain example & usage"
Merge "Add more comments that explain example & usage"
Merge "Add more comments that explain example & usage"