7 uses of REQUIREMENT_OK

drupal_requirements_severity in core/includes/install.inc
Extracts the highest severity from the requirements array.
locale_requirements in core/modules/locale/locale.install
Implements hook_requirements().
mysql_requirements in core/modules/mysql/mysql.install
Implements hook_requirements().
pgsql_requirements in core/modules/pgsql/pgsql.install
Implements hook_requirements().
StatusReport::preRenderGroupRequirements in core/lib/Drupal/Core/Render/Element/StatusReport.php
#pre_render callback to group requirements.
StatusReportPage::preRenderGeneralInfo in core/modules/system/src/Element/StatusReportPage.php
#pre_render callback to get general info out of requirements.
system_requirements in core/modules/system/system.install
Implements hook_requirements().

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