fix LayerGroup eachLayer function and bump to 1.1.1 version

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.gwidgets</groupId>
 	<artifactId>gwty-leaflet</artifactId>
-	<version>1.1</version>
+	<version>1.1.1</version>
 	<packaging>gwt-lib</packaging>
 
 	<properties>
@@ -93,6 +93,55 @@
 				<artifactId>maven-jar-plugin</artifactId>
 				<version>3.0.1</version>
 			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-gpg-plugin</artifactId>
+				<version>3.0.1</version>
+				<executions>
+					<execution>
+						<id>sign-artifacts</id>
+						<phase>verify</phase>
+						<goals>
+							<goal>sign</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+				  <!-- add here user name and passoword -->
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-source-plugin</artifactId>
+				<version>3.2.0</version>
+				<executions>
+					<execution>
+						<id>attach-sources</id>
+						<phase>package</phase>
+						<goals>
+							<goal>jar-no-fork</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-javadoc-plugin</artifactId>
+				<version>3.3.1</version>
+				<configuration>
+					<failOnError>false</failOnError>
+					<failOnWarnings>false</failOnWarnings>
+				</configuration>
+				<executions>
+					<execution>
+						<id>attach-sources</id>
+						<phase>package</phase>
+						<goals>
+							<goal>jar</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 		</plugins>
 	</build>
 	<name>gwty-leaflet</name>

src/main/java/com/gwidgets/api/leaflet/LayerGroup.java

@@ -4,7 +4,6 @@
 import com.gwidgets.api.leaflet.options.PopupOptions;
 import com.gwidgets.api.leaflet.options.TooltipOptions;
 
-import elemental2.core.Function;
 import elemental2.core.JsObject;
 import elemental2.dom.HTMLElement;
 /**
@@ -21,7 +20,9 @@
  * See the License for the specific language governing permissions and
  *  limitations under the License.
  */
+import jsinterop.annotations.JsFunction;
 import jsinterop.annotations.JsMethod;
+import jsinterop.annotations.JsProperty;
 import jsinterop.annotations.JsType;
 
 
@@ -33,6 +34,12 @@
 public class LayerGroup implements Layer, Evented {
 
 
+	/**
+	 * Function that will be called on each created feature layer. Useful for attaching events and popups to features.
+	 */
+	@JsProperty
+	public EachLayerFunction eachLayer;
+
 	/**
 	 * Adds a given layer to the group.
 	 *
@@ -94,16 +101,6 @@ public class LayerGroup implements Layer, Evented {
 	@JsMethod
 	public native L clearLayers();
 
-	/**
-	 * Iterates over the layers of the group, optionally specifying context of the iterator function.
-	 *
-	 * @param fn the action function
-	 * @param context the context
-	 * @return the l
-	 */
-	@JsMethod
-	public native L eachLayer(Function fn, JsObject context);
-
 	/**
 	 * Returns a GeoJSON representation of the layer group (GeoJSON FeatureCollection).
 	 *
@@ -370,4 +367,8 @@ public class LayerGroup implements Layer, Evented {
 		 */
 		public native L removeEventParent(Evented obj);
 
+	@JsFunction
+	public interface EachLayerFunction {
+		void apply(Layer feature, JsObject context);
+	}
 }