Appending the Paginator tree walker hint, instead of removing all the other hints.
Added docblock.
Added a test which verifies that the tree walkers are kept.
Allow query parameters starting with an underscore
Fixed name colision.
Add test for query paremeters starting with underscore
Allow to have non-distinct queries
add missing hint about lifecycle callback
PersistentCollection - initialize coll - create failing tests
Initialize coll when using Collection methods inside PersistentCollection
do not initialize coll on add()
remove redundant require_once for TestInit.php
convert PersistentCollection functional tests to unit tests
Fix proxy performance test
Merge pull request #735 from FabioBatSilva/fix-proxy-performance-test

Fix proxy performance test
Modified Hydrators to be per-query instances instead of a singleton-like approach.
Kept BC.
Merge pull request #738 from doctrine/VolatileQueryHydrators

Modified Hydrators to be per-query instances instead of a singleton-like approach
Merge pull request #717 from hackedd/patch-1

Allow query parameters starting with an underscore
fix DDC-2579