declare var Module: {
  _SPI_box: Function;
  _SPI_torus: Function;
  _SPI_sphere: Function;
  _SPI_cylinder: Function;
  _SPI_cone: Function;
  _SPI_boolean: Function,
  _SPI_extrude: Function;
  _SPI_stepImport: Function;
  _SPI_revolve: Function;
  _SPI_loftPreview: Function;
  _SPI_loft: Function;
  _SPI_fillet: Function;
  _SPI_loadModel: Function;
  _SPI_tessellate: Function;
  _SPI_transform: Function;
};