in transcript.js [4:14]
static getMessages(transcript) {
var messages = (transcript && _.isArray(transcript)) ? _.filter(transcript, function (obj) {
return obj.type === "message" || obj.type === "endOfConversation";
}
) : [];
messages = _.map(messages,
function(message) {
return _.pick(message, ["type", "text", "attachments", "speak", "locale", "textFormat", "from", "recipient", "value"]);
});
return messages;
}