def list_available_response_headers(custom_headers:nil)
      response = list_available_response_headers_async(custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def list_available_response_headers(custom_headers:nil)
      response = list_available_response_headers_async(custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def list_available_response_headers ( custom_headers : nil ) response = list_available_response_headers_async ( custom_headers :custom_headers ) . value! response . body unless response . nil? end
Lists all available response headers.

 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [Array] operation results.
Lists all available response headers .