replyChannelMessage method
Implementation
void replyChannelMessage(String messageId, String channelId, String message) {
postMessage("replyChannelMessage",
{"channelId": channelId, "messageId": messageId, "message": message});
}
void replyChannelMessage(String messageId, String channelId, String message) {
postMessage("replyChannelMessage",
{"channelId": channelId, "messageId": messageId, "message": message});
}