3 calls to variable_initialize()

DrupalWebTestCase::refreshVariables in modules/simpletest/drupal_web_test_case.php: Refresh the in-memory set of variables. Useful after a page request is made that changes a variable in a different thread.
_drupal_bootstrap_variables in includes/bootstrap.inc: Loads system variables and all enabled bootstrap modules.
_menu_check_rebuild in includes/menu.inc: Checks whether a menu_rebuild() is necessary.

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