Checkout fields
Manage custom checkout questions for the store (non-core fields only).
Core system fields are not exposed. Field values are submitted on the cart via
custom_field_values keyed by field name.
List checkout fields
Returns non-core custom checkout fields for the store, ordered by `position`.
Create checkout field
Create checkout field
Retrieve checkout field
Retrieve checkout field
Update checkout field
Update checkout field
Partially update checkout field
Partially update checkout field
Delete checkout field
Soft-deletes a non-core checkout field.