message: fix: fix typings for fieldbag find method
diff: @@ -107,7 +107,7 @@ export class ErrorBag {
  export class FieldBag {
  items: Field[];
  filter(matcher: {name?: string, scope?: string, id?: string}): Field[];
  - find(matcher: {name?: string, scope?: string, id?: string}): Field;
  + find(matcher: {name?: string, scope?: string, id?: string}): Field | undefined;
  map(fn: Function): Field[];
  }
  