Add supplier overloads to DamageCalculationEvent

Author: Yeregorix

src/main/java/org/spongepowered/api/event/entity/DamageCalculationEvent.java

@@ -38,6 +38,7 @@
 import org.spongepowered.eventgen.annotations.ImplementedBy;
 
 import java.util.List;
+import java.util.function.Supplier;
 
 /**
  * The base event for when some damage is calculated,
@@ -82,6 +83,16 @@ public interface DamageCalculationEvent extends Event, Cancellable {
     @ImplementedBy(AbstractDamageCalculationEventPre.class)
     interface Pre extends DamageCalculationEvent {
 
+        /**
+         * Gets a mutable list of all modifiers that applies just before the step.
+         *
+         * @param type The step type
+         * @return The list of modifiers
+         */
+        default List<DamageModifier> modifiersBefore(Supplier<DamageStepType> type) {
+            return this.modifiersBefore(type.get());
+        }
+
         /**
          * Gets a mutable list of all modifiers that applies just before the step.
          *
@@ -90,6 +101,16 @@ interface Pre extends DamageCalculationEvent {
          */
         List<DamageModifier> modifiersBefore(DamageStepType type);
 
+        /**
+         * Gets a mutable list of all modifiers that applies just after the step.
+         *
+         * @param type The step type
+         * @return The list of modifiers
+         */
+        default List<DamageModifier> modifiersAfter(Supplier<DamageStepType> type) {
+            return this.modifiersAfter(type.get());
+        }
+
         /**
          * Gets a mutable list of all modifiers that applies just after the step.
          *