2 functions implement hook_page_top()

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

big_pipe_test_page_top in core/modules/big_pipe/tests/modules/big_pipe_test/big_pipe_test.module

Implements hook_page_top().

session_exists_cache_context_test_page_top in core/modules/system/tests/modules/session_exists_cache_context_test/session_exists_cache_context_test.module

Implements hook_page_top().