diff --git a/src/main/java/lsh/ext/gson/IBuilder0.java b/src/main/java/lsh/ext/gson/IBuilder0.java
index 550b3933..52d45c0a 100644
--- a/src/main/java/lsh/ext/gson/IBuilder0.java
+++ b/src/main/java/lsh/ext/gson/IBuilder0.java
@@ -8,6 +8,12 @@ public interface IBuilder0<R> {
 
 	R build();
 
+	static <R> IBuilder0<R> of(
+			final Supplier<? extends R> build
+	) {
+		return build::get;
+	}
+
 	interface ILookup<R> {
 
 		Supplier<IBuilder0<R>> lookup(TypeToken<? super R> typeToken);
diff --git a/src/main/java/lsh/ext/gson/IBuilder1.java b/src/main/java/lsh/ext/gson/IBuilder1.java
index 89fec1ff..a2f8f860 100644
--- a/src/main/java/lsh/ext/gson/IBuilder1.java
+++ b/src/main/java/lsh/ext/gson/IBuilder1.java
@@ -2,6 +2,7 @@
 
 import java.util.Collection;
 import java.util.function.BiConsumer;
+import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collector;
@@ -15,20 +16,27 @@ public interface IBuilder1<A1, R> {
 
 	R build();
 
-	static <E, C extends Collection<E>> IBuilder1<E, C> of(final C collection) {
+	static <A1, R> IBuilder1<A1, R> of(
+			final Consumer<? super A1> consume,
+			final Supplier<? extends R> build
+	) {
 		return new IBuilder1<>() {
 			@Override
-			public void accept(final E e) {
-				collection.add(e);
+			public void accept(final A1 a1) {
+				consume.accept(a1);
 			}
 
 			@Override
-			public C build() {
-				return collection;
+			public R build() {
+				return build.get();
 			}
 		};
 	}
 
+	static <E, C extends Collection<E>> IBuilder1<E, C> of(final C collection) {
+		return of(collection::add, () -> collection);
+	}
+
 	static <E, C extends Collection<E>> Supplier<IBuilder1<E, C>> from(final Supplier<? extends C> collectionFactory) {
 		return () -> of(collectionFactory.get());
 	}
diff --git a/src/main/java/lsh/ext/gson/IBuilder2.java b/src/main/java/lsh/ext/gson/IBuilder2.java
index ad68316e..a89d7b94 100644
--- a/src/main/java/lsh/ext/gson/IBuilder2.java
+++ b/src/main/java/lsh/ext/gson/IBuilder2.java
@@ -16,20 +16,27 @@ public interface IBuilder2<A1, A2, R> {
 
 	R build();
 
-	static <K, V, M extends Map<K, V>> IBuilder2<K, V, M> of(final M map) {
+	static <A1, A2, R> IBuilder2<A1, A2, R> of(
+			final BiConsumer<? super A1, ? super A2> consume,
+			final Supplier<? extends R> build
+	) {
 		return new IBuilder2<>() {
 			@Override
-			public void accept(final K k, final V v) {
-				map.put(k, v);
+			public void accept(final A1 a1, final A2 a2) {
+				consume.accept(a1, a2);
 			}
 
 			@Override
-			public M build() {
-				return map;
+			public R build() {
+				return build.get();
 			}
 		};
 	}
 
+	static <K, V, M extends Map<K, V>> IBuilder2<K, V, M> of(final M map) {
+		return of(map::put, () -> map);
+	}
+
 	static <K, V, M extends Map<K, V>> Supplier<IBuilder2<K, V, M>> from(final Supplier<? extends M> factory) {
 		return () -> of(factory.get());
 	}