Libraries which containing the PHP class FixedPool

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

Jenner\SimpleFork\FixedPool

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This class belongs to the vendor Jenner and the package Simple_fork

Jenner\SimpleFork\FixedPool

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This class belongs to the vendor Maksimovic and the package Simple-fork-php

Bandzaai\Threading\FixedPool

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This class belongs to the vendor Bandzaai and the package Bzthreading