code: public DescribeRepositoriesRequest withRepositoryNames(String... repositoryNames) {
          if (this.repositoryNames == null) {
              setRepositoryNames(new java.util.ArrayList<String>(repositoryNames.length));
          }
          for (String ele : repositoryNames) {
              this.repositoryNames.add(ele);
          }
          return this;
      }
docs: <p>
  A list of repositories to describe. If this parameter is omitted, then all repositories in a registry are
  described.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setRepositoryNames(java.util.Collection)} or {@link #withRepositoryNames(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param repositoryNames
  A list of repositories to describe. If this parameter is omitted, then all repositories in a registry are
  described.
  @return Returns a reference to this object so that method calls can be chained together.