code: public UpdateJobResult withArtifactList(Artifact... artifactList) {
          if (this.artifactList == null) {
              setArtifactList(new com.amazonaws.internal.SdkInternalList<Artifact>(artifactList.length));
          }
          for (Artifact ele : artifactList) {
              this.artifactList.add(ele);
          }
          return this;
      }
docs: <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setArtifactList(java.util.Collection)} or {@link #withArtifactList(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param artifactList
  @return Returns a reference to this object so that method calls can be chained together.