Fix compile (#837)

Author: uecasm

src/main/java/com/ldtteam/structurize/blocks/schematic/BlockSubstitution.java

@@ -17,6 +17,7 @@
 import net.minecraft.world.phys.shapes.EntityCollisionContext;
 import net.minecraft.world.phys.shapes.Shapes;
 import net.minecraft.world.phys.shapes.VoxelShape;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * This block is used as a substitution block for the Builder. Every solid block can be substituted by this block in schematics. This helps make schematics independent from
@@ -71,14 +72,14 @@ public VoxelShape getBlockSupportShape(BlockState state, BlockGetter worldIn, Bl
     }
 
     @Override
-    public boolean canPlaceLiquid(BlockGetter worldIn, BlockPos pos, BlockState state, Fluid fluid)
+    public boolean canPlaceLiquid(@Nullable Player player, BlockGetter level, BlockPos pos, BlockState state, Fluid fluid)
     {
         // Don't allow water to flow inside despite being non-solid
         return false;
     }
 
     @Override
-    public boolean placeLiquid(LevelAccessor worldIn, BlockPos pos, BlockState state, FluidState fluid)
+    public boolean placeLiquid(LevelAccessor level, BlockPos pos, BlockState state, FluidState fluidState)
     {
         return false;
     }