Global iterator type is coming: https://github.com/tc39/proposal-iterator-helpers https://github.com/tc39/proposal-iterator-helpers But a method named `groupBy

Global iterator type is coming: https://github.com/tc39/proposal-iterator-helpers https://github.com/tc39/proposal-iterator-helpers But a method named `groupBy` on iterators traditionally means a different thing: https://github.com/tc39/proposal-array-grouping/issues/51#issuecomment-1372786948 https://github.com/tc39/proposal-array-grouping/issues/51#is... Global iterable type it's too late for, since there's many extant iterables in the language and on the web which don't have it in their prototype chain and can't reasonably be changed.