# TraceCategoriesAndOptions Object

* `categoryFilter` String – is a filter to control what category groups
  should be traced. A filter can have an optional `-` prefix to exclude
  category groups that contain a matching category. Having both included
  and excluded category patterns in the same list is not supported. Examples:
  `test_MyTest*`, `test_MyTest*,test_OtherStuff`, `-excluded_category1,-excluded_category2`.
* `traceOptions` String - Controls what kind of tracing is enabled,
  it is a comma-delimited sequence of the following strings:
  `record-until-full`, `record-continuously`, `trace-to-console`, `enable-sampling`, `enable-systrace`,
  e.g. `'record-until-full,enable-sampling'`.
  The first 3 options are trace recording modes and hence mutually exclusive.
  If more than one trace recording modes appear in the `traceOptions` string,
  the last one takes precedence. If none of the trace recording modes are
  specified, recording mode is `record-until-full`.
  The trace option will first be reset to the default option (`record_mode` set
  to `record-until-full`, `enable_sampling` and `enable_systrace`
  set to `false`) before options parsed from `traceOptions` are applied on it.