Here is a list of all documented variables with links to the class documentation for each member:

$responseObject : InfluxDB2\ApiException
ACTIVE : InfluxDB2\Model\TaskStatusType
BUCKET : InfluxDB2\Model\TemplateKind
BUILDER : InfluxDB2\Model\QueryEditMode
FILTER : InfluxDB2\Model\BuilderAggregateFunctionType
FLUX : InfluxDB2\Model\ScriptLanguage
IMPLICIT : InfluxDB2\Model\SchemaType
LINE : InfluxDB2\Model\XYGeom
LOG : InfluxDB2\Model\AxisScale
MS : InfluxDB2\Model\WritePrecision
SLACK : InfluxDB2\Model\NotificationEndpointType
UNKNOWN : InfluxDB2\Model\CheckStatusLevel, InfluxDB2\Model\RuleStatusLevel
VERSION : InfluxDB2\Client