Clarify static return type of MessageTrait methods #629
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Per the PSR spec, the methods currently hinting MessageInterface should be returning `static`. That was not supported until PHP 8.0, so to maintain PHP 7 compatibility, a docblock can be used to clarify the return behavior of these methods. Closes guzzle#617.
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Per the PSR spec (and the code), the methods on
MessageTraitcurrently hintingMessageInterfaceshould be returningstatic. That return type was not supported until PHP 8.0, so to maintain PHP 7 compatibility, a docblock can be used to clarify the return behavior of these methods.This should appease static analyzers that throw errors when these methods are used on more specific implementations of
MessageInterface.Closes #617, which should hopefully explain the benefit of this change. Happy to clarify if not.