src/main/java/com/googlecode/objectify/impl/translate/ClassPopulator.java
private Boolean getIndexInstruction(Class<P> clazz) {
		Index ind = clazz.getAnnotation(Index.class);
		Unindex unind = clazz.getAnnotation(Unindex.class);

		if (ind != null && unind != null)
			throw new IllegalStateException("You cannot have @Index and @Unindex on the same class: " + clazz);

		if (ind != null)
			return true;
		else if (unind != null)
			return false;
		else
			return null;
	}
private Boolean getIndexInstruction(Class<P> clazz) {
		Index ind = clazz.getAnnotation(Index.class);
		Unindex unind = clazz.getAnnotation(Unindex.class);

		if (ind != null && unind != null)
			throw new IllegalStateException("You cannot have @Index and @Unindex on the same class: " + clazz);

		if (ind != null)
			return true;
		else if (unind != null)
			return false;
		else
			return null;
	}
Figure out if there is an index instruction for the whole class.
@return true, false, or null (which means no info)