The response message for
[Environments.LookupEnvironmentHistory][google.cloud.dialogflow.cx.v3beta1.Environments.LookupEnvironmentHistory].
Attributes:
environments (Sequence[google.cloud.dialogflowcx_v3beta1.types.Environment]):
Represents a list of snapshots for an environment. Time of
the snapshots is stored in
[update_time][google.cloud.dialogflow.cx.v3beta1.Environment.update_time].
next_page_token (str):
Token to retrieve the next page of results,
or empty if there are no more results in the
list.