code: public StartSupportDataExportRequest withCustomerDefinedValues(java.util.Map<String, String> customerDefinedValues) {
          setCustomerDefinedValues(customerDefinedValues);
          return this;
      }
docs: (Optional) Key-value pairs which will be returned, unmodified, in the Amazon SNS notification message and the
  data set metadata file.
  
  @param customerDefinedValues
  (Optional) Key-value pairs which will be returned, unmodified, in the Amazon SNS notification message and
  the data set metadata file.
  @return Returns a reference to this object so that method calls can be chained together.