Add ray tracing and bounding box API

By: blablubbabc <lukas@wirsindwir.de>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftFluidCollisionMode.java

@@ -0,0 +1,24 @@
+package org.bukkit.craftbukkit;
+
+import org.bukkit.FluidCollisionMode;
+import net.minecraft.server.FluidCollisionOption;
+
+public class CraftFluidCollisionMode {
+
+    private CraftFluidCollisionMode() {}
+
+    public static FluidCollisionOption toNMS(FluidCollisionMode fluidCollisionMode) {
+        if (fluidCollisionMode == null) return null;
+
+        switch (fluidCollisionMode) {
+            case ALWAYS:
+                return FluidCollisionOption.ALWAYS;
+            case SOURCE_ONLY:
+                return FluidCollisionOption.SOURCE_ONLY;
+            case NEVER:
+                return FluidCollisionOption.NEVER;
+            default:
+                return null;
+        }
+    }
+}