GridHandle¶ GridHandle ¶ Opaque handle to a compiled unstructured grid. Produced by build_grid(). The handle is consumed (invalidated) by fit_waterloo() or fit_sspa() — it cannot be reused after fitting. is_loaded ¶ is_loaded() -> bool Return True if the grid data is still resident in memory. Returns False after the handle has been consumed by a fitting call. n_cells ¶ n_cells() -> int Return the number of cells in the grid.