How to use the bigcommerce.resource.ParentResource function in bigcommerce

class Option(ParentResource):
    res_name = "options"
    
class Options(ResourceSet):
    res_name = "options"
    resource_class = Option

class OptionSet(ParentResource):
    res_name = "optionsets"
    
class OptionSets(ResourceSet):
    res_name = "optionsets"
    resource_class = OptionSet

class Order(ParentResource):
    res_name = "orders"
    
class Orders(ResourceSet):
    res_name = "orders"
    resource_class = Order

class Product(ParentResource):
    res_name = "products"
 
class Products(ResourceSet):
    res_name = "products"
    resource_class = Product
    
class Redirect(Resource):
    res_name = "redirects"

class Store(Resource):
    res_name = "store"
    
class Stores(ResourceSet):
    """Only supports GET /store.json, according to documentation."""
    res_name = "store"
    resource_class = Store

class Country(ParentResource):
    res_name = "countries"
        
class Countries(ResourceSet):
    res_name = "countries"
    resource_class = Country

class Customer(ParentResource):
    res_name = "customers"
    
class Customers(ResourceSet):
    res_name = "customers"
    resource_class = Customer
    
class Option(ParentResource):
    res_name = "options"
    
class Options(ResourceSet):
    res_name = "options"
    resource_class = Option

class OptionSet(ParentResource):
    res_name = "optionsets"

class Country(ParentResource):
    res_name = "countries"
        
class Countries(ResourceSet):
    res_name = "countries"
    resource_class = Country

class Customer(ParentResource):
    res_name = "customers"
    
class Customers(ResourceSet):
    res_name = "customers"
    resource_class = Customer
    
class Option(ParentResource):
    res_name = "options"
    
class Options(ResourceSet):
    res_name = "options"
    resource_class = Option

class OptionSet(ParentResource):
    res_name = "optionsets"
    
class OptionSets(ResourceSet):
    res_name = "optionsets"
    resource_class = OptionSet

class Order(ParentResource):
    res_name = "orders"

class OptionSet(ParentResource):
    res_name = "optionsets"
    
class OptionSets(ResourceSet):
    res_name = "optionsets"
    resource_class = OptionSet

class Order(ParentResource):
    res_name = "orders"
    
class Orders(ResourceSet):
    res_name = "orders"
    resource_class = Order

class Product(ParentResource):
    res_name = "products"
 
class Products(ResourceSet):
    res_name = "products"
    resource_class = Product
    
class Redirect(Resource):
    res_name = "redirects"
    
class Redirects(ResourceSet):
    res_name = "redirects"
    resource_class = Redirect
    
class Shipping(ParentResource):
    """Only GET"""
    res_name = "shipping"

class Coupon(Resource):
    res_name = "coupons"
    
class Coupons(ResourceSet):
    res_name = "coupons"
    resource_class = Coupon

class Store(Resource):
    res_name = "store"
    
class Stores(ResourceSet):
    """Only supports GET /store.json, according to documentation."""
    res_name = "store"
    resource_class = Store

class Country(ParentResource):
    res_name = "countries"
        
class Countries(ResourceSet):
    res_name = "countries"
    resource_class = Country

class Customer(ParentResource):
    res_name = "customers"
    
class Customers(ResourceSet):
    res_name = "customers"
    resource_class = Customer
    
class Option(ParentResource):
    res_name = "options"

class Customer(ParentResource):
    res_name = "customers"
    
class Customers(ResourceSet):
    res_name = "customers"
    resource_class = Customer
    
class Option(ParentResource):
    res_name = "options"
    
class Options(ResourceSet):
    res_name = "options"
    resource_class = Option

class OptionSet(ParentResource):
    res_name = "optionsets"
    
class OptionSets(ResourceSet):
    res_name = "optionsets"
    resource_class = OptionSet

class Order(ParentResource):
    res_name = "orders"
    
class Orders(ResourceSet):
    res_name = "orders"
    resource_class = Order

class Product(ParentResource):
    res_name = "products"

def __init__(self, fields=None):
        super(ParentResource, self).__init__(fields)
        self.subresources = SubResourceManager(self)

class Product(ParentResource):
    res_name = "products"
 
class Products(ResourceSet):
    res_name = "products"
    resource_class = Product
    
class Redirect(Resource):
    res_name = "redirects"
    
class Redirects(ResourceSet):
    res_name = "redirects"
    resource_class = Redirect
    
class Shipping(ParentResource):
    """Only GET"""
    res_name = "shipping"