public com.google.protobuf.Timestamp getReadTimestamp() {
    return readTimestamp_ == null
        ? com.google.protobuf.Timestamp.getDefaultInstance()
        : readTimestamp_;
  }
public com . google . protobuf . Timestamp getReadTimestamp ( ) { return readTimestamp_ == null ? com . google . protobuf . Timestamp . getDefaultInstance ( ) : readTimestamp_ ; }
<pre>
For snapshot read-only transactions, the read timestamp chosen
for the transaction. Not returned by default: see
[TransactionOptions.ReadOnly.return_read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.return_read_timestamp].
A timestamp in RFC3339 UTC &#92;"Zulu&#92;" format, accurate to nanoseconds.
Example: `"2014-10-02T15:01:23.045123456Z"`.
</pre>

<code>.google.protobuf.Timestamp read_timestamp = 2;</code>