Simplify creation of DamageModifier

Author: Yeregorix

src/main/java/org/spongepowered/api/event/cause/entity/damage/DamageModifier.java

@@ -78,6 +78,18 @@ static Builder builder() {
         return Sponge.game().builderProvider().provide(Builder.class);
     }
 
+    /**
+     * Creates a new {@link DamageModifier}.
+     *
+     * @param type The damage step type
+     * @param cause The modifier cause
+     * @param function The modifier function
+     * @return The new damage modifier
+     */
+    static DamageModifier of(DamageStepType type, Cause cause, Function function) {
+        return DamageModifier.builder().type(type).cause(cause).function(function).build();
+    }
+
     /**
      * A builder to create {@link DamageModifier}s.
      */