[11.x] groupBy() return type phpdoc #53684
Merged
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In the current phpdoc, the return type of
Collection::groupBy()
is assumed to be a collection with the same values as the original one. However, when the grouping is specified with an array of two or more keys (e.g.,$collection->groupBy(['key1', 'key2'])
), the result is a multi-level collection (i.e., a collection of collections).This PR changes the return type so that it doesn't make assumptions on the collection values when the grouping is specified with an array - while leaving it as it is when it's a single key or a function.
If this PR is merged, I'll make a corresponding PR to larastan, as it contains stubs for these classes/interfaces.