src/main/java/com/spotify/google/cloud/pubsub/client/Pubsub.java (2 lines):
	- line 618: // TODO (dano): use async client when chunked encoding is fixed
	- line 928: // TODO (dano): cache and reuse deflater


src/main/java/com/spotify/google/cloud/pubsub/client/Publisher.java (1 line):
	- line 192: // TODO (dano): fail outstanding futures


src/main/java/com/spotify/google/cloud/pubsub/client/Acker.java (1 line):
	- line 205: // TODO (dano): fail outstanding futures