private CompletionOperations completionOperations() {
		return xdShell.getSpringXDOperations().completionOperations();
	}
Reads the {@link Converter#NB_INVOCATIONS_OPTION_CONTEXT_PREFIX} information and determines how many
times the user has pressed the TAB key.
spring-xd-shell/src/main/java/org/springframework/xd/shell/converter/CompletionConverter.java