RowKeySchema typedef
RowKeySchema = $Empty
Row key definition that reads the input message fields based on the field names of the table's structured row key ({$universe.dns_names.final_documentation_domain}/bigtable/docs/manage-row-key-schemas).
Note that if the field is nullable in the structured row key, then it need not be present in the message; null will be used instead.
Implementation
typedef RowKeySchema = $Empty;