code: public BatchGetTracesResult withUnprocessedTraceIds(String... unprocessedTraceIds) {
          if (this.unprocessedTraceIds == null) {
              setUnprocessedTraceIds(new java.util.ArrayList<String>(unprocessedTraceIds.length));
          }
          for (String ele : unprocessedTraceIds) {
              this.unprocessedTraceIds.add(ele);
          }
          return this;
      }
docs: <p>
  Trace IDs of requests that haven't been processed.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUnprocessedTraceIds(java.util.Collection)} or {@link #withUnprocessedTraceIds(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param unprocessedTraceIds
  Trace IDs of requests that haven't been processed.
  @return Returns a reference to this object so that method calls can be chained together.