[I] SdkSseEventMetadata

Metadata about a single server-sent event within an SSE (text/event-stream) stream.

Derived from the @typespec/events event definitions of the streamed union, plus the @typespec/sse @terminalEvent marker. Gives emitters the information they need to (de)serialize each event without re-deriving it from raw TypeSpec: the wire event: name, whether the event terminates the stream, and the payload type/content type.

Properties

Property	Type	Description
`contentType?`	`string`	The content type of the event (the envelope when `isEventEnvelope` is `true`).
`eventType?`	`string`	The SSE `event:` field name, taken from the named union variant. Undefined for unnamed variants, which are `message` events with no `event:` field.
`isEventEnvelope`	`boolean`	Whether `type` describes an event envelope wrapping a separate `@data` payload. When `false`, `type` and `payloadType` (and their content types) are the same.
`isTerminalEvent`	`boolean`	Whether the presence of this event terminates the stream and the client should disconnect (from `@terminalEvent`).
`payloadContentType?`	`string`	The content type of the event payload. Matches `contentType` when `isEventEnvelope` is `false`.
`payloadType`	`SdkType`	The type of the event payload. Matches `type` when `isEventEnvelope` is `false`.
`type`	`SdkType`	The event type. Represents the event envelope when `isEventEnvelope` is `true`.