The name or unique identifier that corresponds to a physical instance ID of a resource supported by AWS CloudFormation. For example, for an
            Amazon Elastic Compute Cloud (EC2) instance, PhysicalResourceId corresponds to the InstanceId. You can pass the EC2
            InstanceId to DescribeStackResources to find which stack the instance belongs to and what other resources are part of the
            stack. Required: Conditional. If you do not specify PhysicalResourceId, you must specify StackName. Default: There is no
            default value.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string PhysicalResourceId { get; set; }