OptionalStartGets or sets the start time UTC.
OptionalEndGets or sets the end time UTC.
OptionalStatusGets or sets the status.
OptionalNameGets or sets the name.
OptionalKeyGets or sets the key.
OptionalIdGets or sets the id.
OptionalErrorGets or sets the error message.
OptionalLongGets or sets the long error message.
Class TaskExecutionInfo.