key property

String? key
getter/setter pair

The key is a name of one of the Dataset's data columns.

The values of the key (the values in the column) must be in RFC 3339 date-time format, where time-offset = "Z" (e.g. 1985-04-12T23:20:50.52Z). If for a piece of data the key is not present or has an invalid value, that piece is ignored by the pipeline.

Required.

Implementation

core.String? key;