Added WorldProviderTheEnd for diff visibility.

src/main/java/net/minecraft/server/WorldProviderTheEnd.java

@@ -0,0 +1,42 @@
+package net.minecraft.server;
+
+public class WorldProviderTheEnd extends WorldProvider {
+
+    public WorldProviderTheEnd() {}
+
+    public void a() {
+        this.c = new WorldChunkManagerHell(BiomeBase.SKY, 0.5F, 0.0F);
+        this.dimension = 1;
+        this.e = true;
+    }
+
+    public IChunkProvider getChunkProvider() {
+        return new ChunkProviderTheEnd(this.a, this.a.getSeed());
+    }
+
+    public float a(long i, float f) {
+        return 0.0F;
+    }
+
+    public boolean c() {
+        return false;
+    }
+
+    public boolean d() {
+        return false;
+    }
+
+    public boolean canSpawn(int i, int j) {
+        int k = this.a.b(i, j);
+
+        return k == 0 ? false : Block.byId[k].material.isSolid();
+    }
+
+    public ChunkCoordinates e() {
+        return new ChunkCoordinates(100, 50, 0);
+    }
+
+    public int getSeaLevel() {
+        return 50;
+    }
+}