# gdtest_stress_all_docstr > Stress test with every docstring feature. ## Docs ### API Reference #### Classes > Main classes provided by the package - [DataHolder](reference/DataHolder.html): A container for holding computation results #### Functions > Utility functions - [mega_function](reference/mega_function.html): Perform a mega computation combining all docstring features - [other_func](reference/other_func.html): Apply a square-root transformation to a single value