UnknownDirective
class UnknownDirective constructor(val message: String, val sourceLocation: SourceLocation?, val requireDefinition: Boolean) : GraphQLValidationIssue
An unknown directive was found.
In a perfect world everyone uses SDL schemas, and we can validate directives but in this world, a lot of users rely on introspection schemas that do not contain directives. If this happens, we pass them through without validation.
In some cases (e.g. @oneOf) we want to enforce that the directive is defined. In that case requireDefinition is true and the issue will be raised as an error rather than warning.