/**
  * Describe Regions 
  * The DescribeRegions operation describes regions zones that are currently available to the account.
  * 
  * @see http://docs.amazonwebservices.com/AWSEC2/2008-12-01/DeveloperGuide/ApiReference-Query-DescribeRegions.html
  * @param mixed $request array of parameters for Amazon_EC2_Model_DescribeRegionsRequest request
  * or Amazon_EC2_Model_DescribeRegionsRequest object itself
  * @see Amazon_EC2_Model_DescribeRegions
  * @return Amazon_EC2_Model_DescribeRegionsResponse Amazon_EC2_Model_DescribeRegionsResponse
  *
  * @throws Amazon_EC2_Exception
  */
 public function describeRegions($request)
 {
     if (!$request instanceof Amazon_EC2_Model_DescribeRegionsRequest) {
         require_once 'Amazon/EC2/Model/DescribeRegionsRequest.php';
         $request = new Amazon_EC2_Model_DescribeRegionsRequest($request);
     }
     require_once 'Amazon/EC2/Model/DescribeRegionsResponse.php';
     return Amazon_EC2_Model_DescribeRegionsResponse::fromXML($this->_invoke($this->_convertDescribeRegions($request)));
 }
 /**
  * Describe Regions 
  * The DescribeRegions operation describes regions zones that are currently available to the account.
  *   
  * @see http://docs.amazonwebservices.com/AWSEC2/2008-12-01/DeveloperGuide/ApiReference-Query-DescribeRegions.html      
  * @param mixed $request array of parameters for Amazon_EC2_Model_DescribeRegions request or Amazon_EC2_Model_DescribeRegions object itself
  * @see Amazon_EC2_Model_DescribeRegions
  * @return Amazon_EC2_Model_DescribeRegionsResponse Amazon_EC2_Model_DescribeRegionsResponse
  *
  * @throws Amazon_EC2_Exception
  */
 public function describeRegions($request)
 {
     require_once 'Amazon/EC2/Model/DescribeRegionsResponse.php';
     return Amazon_EC2_Model_DescribeRegionsResponse::fromXML($this->_invoke('DescribeRegions'));
 }