directive @inaccessible on FIELD_DEFINITION
    | OBJECT
    | INTERFACE
    | UNION
    | ENUM
    | ENUM_VALUE
    | SCALAR
    | INPUT_OBJECT
    | INPUT_FIELD_DEFINITION
    | ARGUMENT_DEFINITION

Inaccessible directive marks location within schema as inaccessible from the GraphQL Gateway. This allows you to incrementally add schema elements (e.g. fields) to multiple subgraphs without breaking composition.

Example:

class Product(
  val id: String,
  @InaccessibleDirective
  val secret: String
)

will be generated by the subgraph as

type Product {
  id: String!
  secret: String! @inaccessible
}

but will exposed on the GraphQL Gateway as

type Product {
  id: String!
}