Checks if DescribeInternetGatewaysResult property is set
            
 Declaration Syntax
 Declaration Syntax| C# | 
public bool IsSetDescribeInternetGatewaysResult()
 Return Value
 Return Valuetrue if DescribeInternetGatewaysResult property is set
 Declaration Syntax
 Declaration Syntax| C# | 
public bool IsSetDescribeInternetGatewaysResult()
 Return Value
 Return Value