basicDateTime property Null safety

String basicDateTime

DateTime regex (UTC) Unformatted date time (UTC and Iso8601) Example: 2020-04-27 08:14:39.977, 2020-04-27T08:14:39.977, 2020-04-27 01:14:39.977Z

Implementation

static String basicDateTime =
    r'^\d{4}-\d{2}-\d{2}[ T]\d{2}:\d{2}:\d{2}.\d{3}Z?$';