API Reference > ecschema-editing > Diagnostic > createRelationshipConstraintDiagnosticClass createRelationshipConstraintDiagnosticClass Function Beta Helper method for creating RelationshipConstraintDiagnostic child classes. createRelationshipConstraintDiagnosticClass<ARGS extends any[]>(code: string, messageText: string): undefined Parameter Type Description code string The string that uniquely identifies the type of diagnostic in the format ':'. messageText string The message to associate with the diagnostic class. Defined in ecschema-editing/src/Validation/Diagnostic.ts Line 302 Last Updated: 12 June, 2024