code: public final ListTracesPagedResponse listTraces(String projectId) {
      ListTracesRequest request = ListTracesRequest.newBuilder().setProjectId(projectId).build();
      return listTraces(request);
    }
docs: Returns of a list of traces that match the specified filter conditions.
  
  <p>Sample code:
  
  <pre><code>
  try (TraceServiceClient traceServiceClient = TraceServiceClient.create()) {
  String projectId = "";
  for (Trace element : traceServiceClient.listTraces(projectId).iterateAll()) {
  // doThingsWith(element);
  }
  }
  </code></pre>
  
  @param projectId ID of the Cloud project where the trace data is stored.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails