mode property
Additional field semantics.
Required. Possible string values are:
- "MODE_UNSPECIFIED" : Mode unspecified.
 - "REQUIRED" : The field has required semantics.
 - "NULLABLE" : The field has optional semantics, and may be null.
 - "REPEATED" : The field has repeated (0 or more) semantics, and is a list of values.
 
Implementation
core.String? mode;