final ConstraintValidatorContext context = null;

        // Test basic patterns that should be valid
        String[] potentiallyValidCrons = { "0 0 * * * ?", // Every hour
                "0 */15 * * * ?", // Every 15 minutes
                "0 0 12 * * ?", // Daily at noon
                "0 15 10 ? * MON-FRI" // Weekdays at 10:15
        };

        // Test each pattern and see what actually works

/**
 * Some microbenchmarks for the {@link MoreObjects.ToStringHelper} class.
 *
 * @author Osvaldo Doederlein
 */
@NullUnmarked
public class ToStringHelperBenchmark {

  @Param({"0", "1", "5"})
  int dataSize;

  @Param({"false", "true"})
  boolean omitNulls;

  enum Dataset {
    SMALL {
      @Override
      void addEntries(MoreObjects.ToStringHelper helper) {
        helper

      .isEqualTo(">> 0x00000003   100 HEADERS       END_HEADERS")
    assertThat(frameLog(false, 3, 0, TYPE_DATA, FLAG_END_STREAM))
      .isEqualTo(">> 0x00000003     0 DATA          END_STREAM")
    assertThat(frameLog(true, 0, 15, TYPE_SETTINGS, FLAG_NONE))
      .isEqualTo("<< 0x00000000    15 SETTINGS      ")
    assertThat(frameLog(false, 0, 0, TYPE_SETTINGS, FLAG_ACK))
      .isEqualTo(">> 0x00000000     0 SETTINGS      ACK")