@Nullable
        @Override
        public Object getPropertyValue(@NotNull String propertyName) {
            final DBPExternalFileManager efManager = DBPPlatformDesktop.getInstance().getExternalFileManager();
            return efManager.getFileProperty(platformFile, propertyName);
        }
A {@link IResource}'s session property to distinguish between persisted and newly created resources.
plugins/org.jkiss.dbeaver.ui.editors.sql/src/org/jkiss/dbeaver/ui/editors/sql/SQLEditorUtils.java