Migrate Carpet Mixin names to mojang mappings

src/main/java/carpet/mixins/StandingAndWallBlockItem_creativeNoClipMixin.java

@@ -0,0 +1,38 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.StandingAndWallBlockItem;
+import net.minecraft.world.item.context.BlockPlaceContext;
+import net.minecraft.world.level.LevelReader;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.phys.shapes.CollisionContext;
+import net.minecraft.world.phys.shapes.VoxelShape;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(StandingAndWallBlockItem.class)
+public class StandingAndWallBlockItem_creativeNoClipMixin
+{
+    @Redirect(method = "getPlacementState", at = @At(
+                value = "INVOKE",
+                target = "Lnet/minecraft/world/level/LevelReader;isUnobstructed(Lnet/minecraft/world/level/block/state/BlockState;Lnet/minecraft/core/BlockPos;Lnet/minecraft/world/phys/shapes/CollisionContext;)Z"
+    ))
+    private boolean canCreativePlayerPlace(
+            LevelReader worldView, BlockState state, BlockPos pos, CollisionContext context,
+            BlockPlaceContext itemcontext
+    )
+    {
+        Player player = itemcontext.getPlayer();
+        if (CarpetSettings.creativeNoClip && player != null && player.isCreative() && player.getAbilities().flying)
+        {
+            // copy from canPlace
+            VoxelShape voxelShape = state.getCollisionShape(worldView, pos, context);
+            return voxelShape.isEmpty() || worldView.isUnobstructed(player, voxelShape.move(pos.getX(), pos.getY(), pos.getZ()));
+
+        }
+        return worldView.isUnobstructed(state, pos, context);
+    }
+}