https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Entity%21EntityManager.php/function/EntityManager%3A%3AgetFormDisplay/8.9.x
function EntityManager::getFormDisplay | Drupal API
functionentitymanagerdrupalapi
https://access.redhat.com/webassets/avalon/d/red_hat_jboss_enterprise_application_platform/7.2/javadocs/javax/persistence/class-use/EntityManager.html
Uses of Interface javax.persistence.EntityManager (Red Hat JBoss Enterprise Application Platform...
red hat jboss
https://www.eclipse.org/lists/eclipselink-dev/msg05276.html
[eclipselink-dev] Bug 332464 - EntityManager running out of connections
out ofeclipselinkdevbugentitymanager
https://public.dhe.ibm.com/ibmdl/export/pub/software/olrepo/io/openliberty/com.ibm.ws.jpa.tests.spec10.entitymanager/
Index of /ibmdl/export/pub/software/olrepo/io/openliberty/com.ibm.ws.jpa.tests.spec10.entitymanager
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Entity%21EntityManager.php/class/EntityManager/8.9.x
class EntityManager | Drupal API
classentitymanagerdrupalapi