API Reference > ecschema-metadata > Diagnostic > createRelationshipConstraintDiagnosticClass createRelationshipConstraintDiagnosticClass Function Deprecated Moved to the ecschema-editing package. 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 core/ecschema-metadata/src/Validation/Diagnostic.ts Line 324 Last Updated: 29 November, 2022