Message constructor

const Message(String text, DateTime timestamp, Person? person, { String? dataMimeType, String? dataUri, })

Constructs an instance of Message.

Implementation

const Message(
  this.text,
  this.timestamp,
  this.person, {
  this.dataMimeType,
  this.dataUri,
}) : assert(
        (dataMimeType == null && dataUri == null) ||
            (dataMimeType != null && dataUri != null),
        'Must provide both dataMimeType and dataUri together or not at all.',
      );