public FunctionCall findFunctionCall() {
		if (toolCalls != null && !toolCalls.isEmpty()) {
			for (ToolCall toolCall : toolCalls) {
				if (Objects.equals(toolCall.getType(), "function")) {
					return toolCall.getFunction();
				}
			}
		}
		return null;
	}
the name of the author of this message
src/main/java/org/mvnsearch/chatgpt/model/completion/chat/ChatMessage.java