@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + PROJECT_ID_FIELD_NUMBER;
    hash = (53 * hash) + getProjectId().hashCode();
    hash = (37 * hash) + TRACE_ID_FIELD_NUMBER;
    hash = (53 * hash) + getTraceId().hashCode();
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
Required. ID of the trace to return.
</pre>

<code>string trace_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for traceId.
java-trace/proto-google-cloud-trace-v1/src/main/java/com/google/devtools/cloudtrace/v1/GetTraceRequest.java