code: public ListConfigurationsResult withConfigurations(Configuration... configurations) {
          if (this.configurations == null) {
              setConfigurations(new java.util.ArrayList<Configuration>(configurations.length));
          }
          for (Configuration ele : configurations) {
              this.configurations.add(ele);
          }
          return this;
      }
docs: The list of all revisions for the specified configuration.
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setConfigurations(java.util.Collection)} or {@link #withConfigurations(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param configurations
  The list of all revisions for the specified configuration.
  @return Returns a reference to this object so that method calls can be chained together.