EMMessage.createTxtSendMessage constructor Null safety

EMMessage.createTxtSendMessage(
  1. String username,
  2. String content
)

构造发送的文字消息

Implementation

EMMessage.createTxtSendMessage(
  String username,
  String content,
) : this.createSendMessage(
        to: username,
        body: EMTextMessageBody(content: content),
      );