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<?php
namespace Carpenstar\ByBitAPI\Core\Objects\Collection;
class StringCollection extends AbstractCollection
{
/**
* @param string|null $item
* @return $this
*/
public function push(?string $item = null): self
$this->collection[0] = $item;
return $this;
}
* @return string
public function fetch(): ?string
$item = current($this->collection);
next($this->collection);
return is_bool($item) ? null : $item;
carpenstar /
bybitapi-sdk-core
