# gdtest_ref_reorder > Test reference config reordering. ## Docs ### API Reference #### Functions > Utility functions - [compute](reference/compute.html): Compute the square of a value - [transform](reference/transform.html): Transform a list by doubling each element #### Classes > Data classes - [DataModel](reference/DataModel.html): A data model for holding and validating data - [Schema](reference/Schema.html): A schema for parsing and validating structured data