Update launchProjectile API (#11300)

patches/api/More-Projectile-API.patch

@@ -5,6 +5,7 @@ Subject: [PATCH] More Projectile API
 
 Co-authored-by: Nassim Jahnke <nassim@njahnke.dev>
 Co-authored-by: SoSeDiK <mrsosedik@gmail.com>
+Co-authored-by: MelnCat <melncatuwu@gmail.com>
 
 diff --git a/src/main/java/org/bukkit/entity/AbstractArrow.java b/src/main/java/org/bukkit/entity/AbstractArrow.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
@@ -486,3 +487,34 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    void setHasDealtDamage(boolean hasDealtDamage);
  }
  // Paper end
+diff --git a/src/main/java/org/bukkit/projectiles/ProjectileSource.java b/src/main/java/org/bukkit/projectiles/ProjectileSource.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/projectiles/ProjectileSource.java
++++ b/src/main/java/org/bukkit/projectiles/ProjectileSource.java
+@@ -0,0 +0,0 @@ public interface ProjectileSource {
+      */
+     @NotNull
+     public <T extends Projectile> T launchProjectile(@NotNull Class<? extends T> projectile, @Nullable Vector velocity);
++    
++    // Paper start - add consumer to launchProjectile
++    /**
++     * Launches a {@link Projectile} from the ProjectileSource with an
++     * initial velocity, with the supplied function run before the
++     * entity is added to the world.
++     * <br>
++     * Note that when the function is run, the entity will not be actually in
++     * the world. Any operation involving such as teleporting the entity is undefined
++     * until after this function returns.
++     * <p>
++     * The family of launchProjectile methods only promise the ability to launch projectile types
++     * that the {@link ProjectileSource} is capable of firing in vanilla.
++     * Any other types of projectiles *may* be implemented but are not part of the method contract.
++     * @param <T> a projectile subclass
++     * @param projectile class of the projectile to launch
++     * @param velocity the velocity with which to launch
++     * @param function the function to be run before the entity is spawned
++     * @return the launched projectile
++     */
++    <T extends Projectile> @NotNull T launchProjectile(@NotNull Class<? extends T> projectile, @Nullable Vector velocity, java.util.function.@Nullable Consumer<? super T> function);
++    // Paper end - add consumer to launchProjectile
+ }