Libraries which containing the PHP class AbstractConfigResolver

Solve: PHP Fatal error: Uncaught Error: Class "AbstractConfigResolver" not found

Symplify\SetConfigResolver\AbstractConfigResolver

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This class belongs to the vendor Rector and the package Rector-php71

Symplify\SetConfigResolver\AbstractConfigResolver

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This class belongs to the vendor Symplify and the package Set-config-resolver

Symplify\SetConfigResolver\AbstractConfigResolver

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This class belongs to the vendor Symplify and the package Easy-coding-standard-prefixed