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();

        }
    }

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

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

        }
    }

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

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

        // First call: reject, Second call: accept
        when(filter.accept(any(SmbResource.class))).thenReturn(false, true);

        NetServerFileEntryAdapterIterator itr = new NetServerFileEntryAdapterIterator(parent, delegate, filter);

        // Act
        assertTrue(itr.hasNext());
        SmbResource r = itr.next();

        // Assert: filter was invoked twice and we got the accepted one

			continue
		}
		maps[ent.Key] = ent.Value
		// keys = append(keys, ent.Key)
	}
	return maps
}

// Keys returns a slice of the keys in the cache, from oldest to newest.
// Expired entries are filtered out.
func (c *LRU[K, V]) Keys() []K {
	c.mu.Lock()
	defer c.mu.Unlock()
	keys := make([]K, 0, len(c.items))
	now := time.Now()
	for ent := c.evictList.Back(); ent != nil; ent = ent.PrevEntry() {

     * 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

        }
    }

    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);
    }

		RemoveSensitiveHeaders(test.Header)
		if !isEqual(test.ExpectedHeader, test.Header) {
			t.Errorf("Test %d: filtered headers do not match expected headers - got: %v , want: %v", i, test.Header, test.ExpectedHeader)
		}
		RemoveSensitiveEntries(metadata)
		if !areKeysEqual(test.ExpectedHeader, metadata) {
			t.Errorf("Test %d: filtered headers do not match expected headers - got: %v , want: %v", i, test.Header, test.ExpectedHeader)
		}
	}

        }
    }

    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);
    }

                List<String> unfiltered = new ArrayList<>();
                unfiltered.add("yyy");
                unfiltered.addAll(ImmutableList.copyOf(elements));
                unfiltered.add("zzz");
                unfiltered.add("abc");
                return Collections2.filter(Collections2.filter(unfiltered, LENGTH_1), NOT_YYY_ZZZ);
              }
            })