question: public boolean release ( DTM dtm , boolean shouldHardDelete ) { if ( m_rtfdtm_stack != null && m_rtfdtm_stack . contains ( dtm ) ) { return false ; } return m_dtmManager . release ( dtm , shouldHardDelete ) ; }
target:  Release a DTM either to a lru pool, or completely remove reference. DTMs without system IDs are always hard deleted. State: experimental.