@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getCreateTime());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getEndTime());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(target_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, target_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(verb_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(4, verb_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(statusMessage_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, statusMessage_);
    }
    if (requestedCancellation_ != false) {
      size += com.google.protobuf.CodedOutputStream.computeBoolSize(6, requestedCancellation_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(apiVersion_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(7, apiVersion_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
Output only. API version used to start the operation.
</pre>

<code>string api_version = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for apiVersion.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/OperationMetadata.java