Most of the javac implementation for HandleBuilder, plus

some minor updates and refactoring in the eclipse HandleBuilder.

test/transform/resource/before/BuilderWithExistingBuilderClass.java

@@ -0,0 +1,15 @@
+import lombok.experimental.Builder;
+
+class BuilderWithExistingBuilderClass<T, K extends Number> {
+	@Builder
+	public static <Z extends Number> BuilderWithExistingBuilderClass<String, Z> staticMethod(Z arg1, boolean arg2, String arg3) {
+		return null;
+	}
+	
+	public static class BuilderWithExistingBuilderClassBuilder<Z extends Number> {
+		private Z arg1;
+		
+		public void arg2(boolean arg) {
+		}
+	}
+}