* `force_placement` is a boolean indicating whether nodes other than `air` and
`ignore` are replaced by the schematic
* Returns nil if the schematic could not be loaded.
+ * **Warning**: Once you have loaded a schematic from a file, it will be cached. Future calls
+ will always use the cached version and the replacement list defined for it,
+ regardless of whether the file or the replacement list parameter have changed.
+ The only way to load the file anew is to restart the server.
* `minetest.place_schematic_on_vmanip(vmanip, pos, schematic, rotation, replacement, force_placement)`:
* This function is analogous to minetest.place_schematic, but places a schematic onto the