code: public final boolean verifyEventCondition(MessageEnvelope envelope) {
  		String message = safeGetQuickReplyPayload(envelope);
  		if (caseSensitive) {
  			expectedString = expectedString.toLowerCase();
  			message = message.toLowerCase();
  		}
  		return message.equals(expectedString);
  	}
docs: Verify event condition.
  
  @param envelope
  the envelope
  @return true if the text message received by the callback equals the
  expected message, false otherwise.