Directives _mappedType, _mappedInputField and _mappedOperation not in schema

SPQR adds the directives _mappedType, _mappedInputField and _mappedOperation to types, fields, queries and more. When doing introspection on the schema (for example with the query graphql.introspection.IntrospectionQuery.INTROSPECTION_QUERY) the three directives are not listed as part of the schema. Some query validations in apollo throw errors due to the fact that the definition of the directives is not in the schema.

Is there a way to get the definition of the directives in the schema?

[ankit-joinwal]

Here is a working example of how to use SPQR with Apollo Federation https://github.com/ankit-joinwal/graphqpl-spqr-federation-poc

[TuomasKiviaho]

I stumbled on the internals by using graphql.schema.idl.SchemaPrinter to see what was generated and wondered what these directives were and what they would mean from the clients perspective. I wonder if these is some way to exclude them from the schema before printing it.