2 invocations of hook_node_grants()

NodeAccessRecordsTest::testNodeAccessRecords in core/modules/node/tests/src/Kernel/NodeAccessRecordsTest.php: Creates a node and tests the creation of node access rules.
node_access_grants in core/modules/node/node.module: Fetches an array of permission IDs granted to the given user ID.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.