Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/HashTable.php
public function add(IComparable $pSource)
    {
        $hash = $pSource->getHashCode();
        if (!isset($this->items[$hash])) {
            $this->items[$hash] = $pSource;
            $this->keyMap[count($this->items) - 1] = $hash;
        }
    }
public function add(IComparable $pSource)
    {
        $hash = $pSource->getHashCode();
        if (!isset($this->items[$hash])) {
            $this->items[$hash] = $pSource;
            $this->keyMap[count($this->items) - 1] = $hash;
        }
    }
Add HashTable item.

@param IComparable $pSource Item to add