type property
Type is the row's kind — the plane's discriminator: page, track, identify or group. (Errors are not here at all: they land on event.error and are read at /v1/event/errors.)
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? type;