Use more precise return type for StreamInterface::getMetadata #103
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The array keys are always strings. And when `null` is passed as `$key` argument, it should always return an array. But that can be only concisely expressed in PHPStan – Psalm requires a template type for conditional types. So let’s use prefixed annotation.
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The array keys are always strings.
And when
nullis passed as$keyargument, it should always return an array. But that can be only concisely expressed in PHPStan – Psalm requires a template type for conditional types. So let’s use prefixed annotation.