src/Primitive/Container/Container.php
public function increase($increaseSize = 1, $value = null)
    {
        $this->items = array_pad($this->items, $this->length() + $this->getIntegerable($increaseSize), $value);

        return $this;
    }
public function increase($increaseSize = 1, $value = null)
    {
        $this->items = array_pad($this->items, $this->length() + $this->getIntegerable($increaseSize), $value);

        return $this;
    }
Increase Container to the specified length with a value.

@param int|IntegerContract $increaseSize
@param null|mixed $value
@return $this