[
    ApolloDiagnostic {
        cache: {
            0: "built_in_types.graphql",
            51: "0051_subscription_operation_with_root_introspection_field.graphql",
        },
        location: DiagnosticLocation {
            file_id: FileId {
                id: 51,
            },
            offset: 21,
            length: 10,
        },
        labels: [
            Label {
                location: DiagnosticLocation {
                    file_id: FileId {
                        id: 51,
                    },
                    offset: 21,
                    length: 10,
                },
                text: "__typename is an introspection field",
            },
        ],
        help: None,
        data: IntrospectionField {
            field: "__typename",
        },
    },
]
