message: custom events trigger definition
diff: },
  "description": "Blob event types."
  },
  + "CustomEventsTrigger": {
  + "description": "Trigger that runs every time a custom event is received.",
  + "type": "object",
  + "allOf": [
  + {
  + "$ref": "#/definitions/MultiplePipelineTrigger"
  + }
  + ],
  + "properties": {
  + "typeProperties": {
  + "description": "Custom Events Trigger properties.",
  + "x-ms-client-flatten": true,
  + "properties": {
  + "subjectBeginsWith": {
  + "description": "The event subject must begin with the pattern provided for trigger to fire. At least one of these must be provided: subjectBeginsWith, subjectEndsWith.",
  + "type": "string"
  + },
  + "subjectEndsWith": {
  + "description": "The event subject must end with the pattern provided for trigger to fire. At least one of these must be provided: subjectBeginsWith, subjectEndsWith.",
  + "type": "string"
  + },
  + "events": {
  + "description": "The list of event types that cause this trigger to fire.",
  + "type": "array",
  + "items": {
  + "type": "object"
  + }
  + },
  + "scope": {
  + "description": "The ARM resource ID of the Azure Event Grid Topic.",
  + "type": "string"
  + }
  + },
  + "required": [
  + "events",
  + "scope"
  + ]
  + }
  + },
  + "required": [
  + "typeProperties"
  + ]
  + },
  "TumblingWindowTrigger": {
  "description": "Trigger that schedules pipeline runs for all fixed time interval windows from a start time without gaps and also supports backfill scenarios (when start time is in the past).",
  "type": "object",
  