* filtered during collection for the appropriate scope.
     *
     * @param session the {@link Session}, must not be {@code null}
     * @param node the {@link Node} to flatten, must not be {@code null}
     * @param scope an optional {@link PathScope} to filter out dependencies
     * @return the flattened list of node

        }
    }

    public void filtered(FilteredCall<RelatedContentCQ, RelatedContentCQ> filteredLambda) {
        filtered(filteredLambda, null);
    }

    public void filtered(FilteredCall<RelatedContentCQ, RelatedContentCQ> filteredLambda, ConditionOptionCall<BoolQueryBuilder> opLambda) {
        bool((must, should, mustNot, filter) -> {
            filteredLambda.callback(must, filter);
        }, opLambda);
    }

     * but only preserves problems that match the given filter.
     *
     * @param <P>           the type of problem
     * @param maxCountLimit the maximum number of problems to preserve
     * @param filter        predicate to decide which problems to record
     * @return a new filtered problem collector instance
     */
    @Nonnull

      derivedSuites.add(createSubsetSuite(parentBuilder, Bound.INCLUSIVE, Bound.EXCLUSIVE));
    }

    return derivedSuites;
  }

  /**
   * Creates a suite whose set has some elements filtered out of view.
   *
   * <p>Because the set may be ascending or descending, this test must derive the relative order of
   * these extreme values rather than relying on their regular sort ordering.
   */

      derivedSuites.add(createSubsetSuite(parentBuilder, Bound.INCLUSIVE, Bound.EXCLUSIVE));
    }

    return derivedSuites;
  }

  /**
   * Creates a suite whose set has some elements filtered out of view.
   *
   * <p>Because the set may be ascending or descending, this test must derive the relative order of
   * these extreme values rather than relying on their regular sort ordering.
   */

      for (Object o : elements) {
        if (o == null) {
          throw new NullPointerException();
        }
      }

      // prepare extreme values to be filtered out of view
      E firstExclusive = delegate.belowSamplesGreater();
      E lastExclusive = delegate.aboveSamplesLesser();
      if (from != Bound.NO_BOUND) {
        extremeValues.add(delegate.belowSamplesLesser());

        response.setHeaders(headers);

        Map<String, List<String>> result = response.getHeaders();
        assertNotNull(result);
        assertEquals(1, result.size()); // null key should be filtered out
        assertTrue(result.containsKey("content-type"));
    }

    @Test
    public void testHeadersWithNullMap() {
        CurlResponse response = new CurlResponse();

	sys.RUnlock()
	// send last n console log messages in order filtered by node
	if cnt > 0 {
		for i := range last {
			entry := lastN[(cnt+i)%last]
			if (entry == log.Info{}) {
				continue
			}
			select {
			case subCh <- entry:
			case <-doneCh:
				return nil
			}
		}
	}
	return sys.pubsub.Subscribe(madmin.LogMaskAll, subCh, doneCh, filter)
}

        }
    }

    public void filtered(FilteredCall<PathMappingCQ, PathMappingCQ> filteredLambda) {
        filtered(filteredLambda, null);
    }

    public void filtered(FilteredCall<PathMappingCQ, PathMappingCQ> filteredLambda, ConditionOptionCall<BoolQueryBuilder> opLambda) {
        bool((must, should, mustNot, filter) -> {
            filteredLambda.callback(must, filter);
        }, opLambda);
    }

        envMap.put("", "value");
        envMap.put("VALID_KEY", "valid_value");

        final Map<String, String> filtered = systemHelper.getFilteredEnvMap(".*");
        assertEquals(1, filtered.size());
        assertEquals("valid_value", filtered.get("VALID_KEY"));
    }

    public void test_normalizeConfigPath_edgeCases() {
        assertEquals("", systemHelper.normalizeConfigPath("   "));