question: public final boolean updateInsets ( final Insets newInsets ) { synchronized ( getStateLock ( ) ) { if ( insets . equals ( newInsets ) ) { return false ; } insets = newInsets ; } return true ; }
target:  Request the window insets from the delegate and compares it with the current one. This method is mostly called by the delegate, e.g. when the window state is changed and insets should be recalculated. <p/> This method may be called on the toolkit thread.