Function isOptionalProperty

Type Parameters

• T extends Readonly<
      {
          assertIs: (a: unknown) => asserts a is unknown;
          cast: (a: unknown) => unknown;
          defaultValue: unknown;
          fill: (a: unknown) => unknown;
          is: (a: unknown) => a is unknown;
          typeName: string;
          validate: (
              a: unknown,
          ) => Result<
              unknown,
              readonly Readonly<
                  {
                      actualValue: unknown;
                      details?: ValidationErrorDetails;
                      expectedType: string;
                      path: readonly string[];
                      typeName: string;
                  },
              >[],
          >;
      },
  >