Previously subtypes of Error extended Error, but the matching subtypes
of ErrorConstructor did not extend ErrorConstructor. The members in
es5.d.ts are identical, so there's no need except for allowing interface
merging into ErrorConstructor to affect subtypes as well.
The files within this directory are used to generate lib.d.ts and lib.es6.d.ts.
Generated files
Any files ending in .generated.d.ts aren't meant to be edited by hand.
If you need to make changes to such files, make a change to the input files for our library generator.
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