Id assigned by the plugin's MessageRequested event handler via the PluginMessageId property. This allows the plugin to associate each message request completed notification with the message sent to Iguana.
The format of the PluginMessageId is to be determined by the plugin author. Iguana does not interpret this value, other than by adding it to logs, and sending it back to the plugin.
SourceMessageRequestCompletedEventInputs Class | iNTERFACEWARE.Iguana.Plugin Namespace