OptionalbaseOptionalbudgetOptionalbudgetOptionalfetchOptionalheadersextra headers on every request, for a caller that has to identify itself
OptionalnowOptionalretrieshow many times a retryable failure is retried before it is raised
Optionalsleep
Groups this plane's spending with others under one governor.
Defaults to the token, which is right whenever a user holds one. Two tokens belonging to one user cannot be told apart from outside, so a caller who knows they do says so here.