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