OptionalassetFile: FileOptionaladjustZtoY: booleanOptionalunit: unitOfLengthEnumThe file to read; its extension decides whether it is STEP or IGES.
OptionaladjustWhen true, the shape is turned so the file's Z-up becomes this library's Y-up.
OptionalunitThe unit the shape comes back in, scaled from whatever unit the file is written in.
A STEP or IGES file for the core
occt.io.loadSTEPorIGES, which reads it into a shape.