Updating base_amount attribute in cart object graphql

src/_includes/graphql/cart-object.md

@@ -8,7 +8,7 @@ Attribute |  Data Type | Description
 `billing_address` | [BillingCartAddress][BillingCartAddress] | Contains the billing address specified in the customer's cart
 `email` | String | The customer's email address
 `id` | ID! | The ID of the cart
-`is_virtual` | Boolean | Indicates whether the cart contains only virtual products
+`is_virtual` | Boolean! | Indicates whether the cart contains only virtual products
 `items` | [[CartItemInterface]][CartItemInterface] | Contains the items in the customer's cart
 `prices` | [CartPrices][CartPrices] | Contains subtotals and totals
 `selected_payment_method` | [SelectedPaymentMethod][SelectedPaymentMethod] | Selected payment method

src/guides/v2.3/graphql/queries/cart.md

@@ -564,7 +564,7 @@ query {
 
 Attribute |  Data Type | Description
 --- | --- | ---
-`cart_id` | String | A 32-character string that is created when you [create a cart]({{page.baseurl}}/graphql/mutations/create-empty-cart.html)
+`cart_id` | String! | A 32-character string that is created when you [create a cart]({{page.baseurl}}/graphql/mutations/create-empty-cart.html)
 
 ## Output attributes {#cart-output}
 
@@ -622,7 +622,7 @@ Attribute |  Data Type | Description
 --- | --- | ---
 `amount` | Money! | The cost of shipping using this shipping method
 `available` | Boolean! | Indicates whether this shipping method can be applied to the cart
-`base_amount` | Money | The base shipping cost, not including taxes or other cost adjustment. Could be null if method is not available
+`base_amount` | Money | Deprecated. This attribute is not applicable for GraphQL
 `carrier_code` | String! | A string that identifies a commercial carrier or an offline shipping method
 `carrier_title` | String! | The label for the carrier code
 `error_message` | String | Describes an error condition