add nullaway to spring, part 1

[zeitlinger]

No description provided.

[trask]

I forget what this does?

[zeitlinger]

Says that this method is called before the object is used

https://github.com/uber/NullAway/wiki/Error-Messages#initializer-method-does-not-guarantee-nonnull-field-is-initialized--nonnull-field--not-initialized

[trask]

is that true in this case? I'm guessing this listener is created, and then beforeChunk is called multiple times?

[zeitlinger]

chunkContextAndBuilder is needed by afterChunk, and beforeChunk is setting it, it's initializing the variable

	/**
	 * Callback before the chunk is executed, but inside the transaction.
	 *
	 * @param context The current {@link ChunkContext}
	 */
	void beforeChunk(ChunkContext context);

	/**
	 * Callback after the chunk is executed, outside the transaction.
	 *
	 * @param context The current {@link ChunkContext}
	 */
	void afterChunk(ChunkContext context);