Add in a convenience method for getting a class instance based on

existence of another Mod. Useful for soft dependencies.

common/cpw/mods/fml/common/event/FMLPostInitializationEvent.java

@@ -1,5 +1,8 @@
 package cpw.mods.fml.common.event;
 
+import com.google.common.base.Throwables;
+
+import cpw.mods.fml.common.Loader;
 import cpw.mods.fml.common.LoaderState.ModState;
 
 public class FMLPostInitializationEvent extends FMLStateEvent
@@ -15,4 +18,21 @@ public class FMLPostInitializationEvent extends FMLStateEvent
         return ModState.POSTINITIALIZED;
     }
 
+    public Object buildSoftDependProxy(String modId, String className)
+    {
+        if (Loader.isModLoaded(modId))
+        {
+            try
+            {
+                Class<?> clz = Class.forName(className,true,Loader.instance().getModClassLoader());
+                return clz.newInstance();
+            }
+            catch (Exception e)
+            {
+                Throwables.propagateIfPossible(e);
+                return null;
+            }
+        }
+        return null;
+    }
 }