Gateway: add MainService accessor

Author: ctrueden

src/main/java/org/scijava/AbstractGateway.java

@@ -45,6 +45,7 @@
 import org.scijava.io.IOService;
 import org.scijava.io.RecentFileService;
 import org.scijava.log.LogService;
+import org.scijava.main.MainService;
 import org.scijava.menu.MenuService;
 import org.scijava.module.ModuleService;
 import org.scijava.object.ObjectService;
@@ -163,6 +164,11 @@ public LogService log() {
 		return get(LogService.class);
 	}
 
+	@Override
+	public MainService main() {
+		return get(MainService.class);
+	}
+
 	@Override
 	public MenuService menu() {
 		return get(MenuService.class);

src/main/java/org/scijava/Gateway.java

@@ -43,6 +43,7 @@
 import org.scijava.io.IOService;
 import org.scijava.io.RecentFileService;
 import org.scijava.log.LogService;
+import org.scijava.main.MainService;
 import org.scijava.menu.MenuService;
 import org.scijava.module.ModuleService;
 import org.scijava.object.ObjectService;
@@ -226,6 +227,13 @@ public interface Gateway extends RichPlugin, Versioned {
 	 */
 	LogService log();
 
+	/**
+	 * Gets this application context's {@link MainService}.
+	 *
+	 * @return The {@link MainService} of this application context.
+	 */
+	MainService main();
+
 	/**
 	 * Gets this application context's {@link MenuService}.
 	 *