question: public synchronized TypeInstance createInstance ( final String name , final String comment , final BaseType baseType , final Section section , final long sectionOffset ) throws CouldntSaveDataException , CouldntLoadDataException { Preconditions . checkNotNull ( name , "Error: name argument can not be null" ) ; Preconditions . checkArgument ( comment == null || ! comment . isEmpty ( ) , "Error: comment can either be null or a non empty string" ) ; Preconditions . checkNotNull ( baseType , "Error: baseType argument can not be null" ) ; Preconditions . checkNotNull ( section , "Error: section argument can not be null" ) ; Preconditions . checkArgument ( sectionOffset >= 0 , "Error: section offset must be greater or equal to zero" ) ; Preconditions . checkArgument ( ! instancesByAddress . containsKey ( new TypeInstanceAddress ( section . getStartAddress ( ) , sectionOffset ) ) ) ; final TypeInstance instance = backend . createTypeInstance ( name , comment , baseType , section , sectionOffset ) ; instancesByAddress . put ( instance . getAddress ( ) , instance ) ; instances . add ( instance ) ; notifyInstanceAdded ( instance ) ; return instance ; }
target:  Creates a new type instance instance and stores it in the database.