class GraphQL::Schema::Printer

def print_schema_definition
  if (schema.query.nil? || schema.query.name == 'Query') &&
     (schema.mutation.nil? || schema.mutation.name == 'Mutation') &&
     (schema.subscription.nil? || schema.subscription.name == 'Subscription')
    return
  end
  operations = [:query, :mutation, :subscription].map do |operation_type|
    object_type = schema.public_send(operation_type)
    # Special treatment for the introspection schema, which prints `{ query: "Root" }`
    if object_type && (warden.get_type(object_type.name) || (object_type.name == "Root" && schema.query == object_type))
      "  #{operation_type}: #{object_type.name}\n"
    else
      nil
    end
  end.compact.join
  "schema {\n#{operations}}"
end