code: @Override
      public ReleaseAddressResult releaseAddress(ReleaseAddressRequest request) {
          request = beforeClientExecution(request);
          return executeReleaseAddress(request);
      }
docs: <p>
  Releases the specified Elastic IP address.
  </p>
  <p>
  [EC2-Classic, default VPC] Releasing an Elastic IP address automatically disassociates it from any instance that
  it's associated with. To disassociate an Elastic IP address without releasing it, use <a>DisassociateAddress</a>.
  </p>
  <p>
  [Nondefault VPC] You must use <a>DisassociateAddress</a> to disassociate the Elastic IP address before you can
  release it. Otherwise, Amazon EC2 returns an error (<code>InvalidIPAddress.InUse</code>).
  </p>
  <p>
  After releasing an Elastic IP address, it is released to the IP address pool. Be sure to update your DNS records
  and any servers or devices that communicate with the address. If you attempt to release an Elastic IP address
  that you already released, you'll get an <code>AuthFailure</code> error if the address is already allocated to
  another AWS account.
  </p>
  <p>
  [EC2-VPC] After you release an Elastic IP address for use in a VPC, you might be able to recover it. For more
  information, see <a>AllocateAddress</a>.
  </p>
  
  @param releaseAddressRequest
  @return Result of the ReleaseAddress operation returned by the service.
  @sample AmazonEC2.ReleaseAddress
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/ReleaseAddress" target="_top">AWS API
  Documentation</a>