src/Call/Arguments.php
public function has(int $index = 0): bool
    {
        if ($this->normalizeIndex($this->count, $index)) {
            return true;
        }

        return false;
    }
public function has(int $index = 0): bool
    {
        if ($this->normalizeIndex($this->count, $index)) {
            return true;
        }

        return false;
    }
public function has ( int $ index = 0 ) : bool { if ( $ this -> normalizeIndex ( $ this -> count , $ index ) ) { return true ; } return false ; }
Returns true if the argument index exists.

Negative indices are offset from the end of the list. That is, `-1`
indicates the last element, and `-2` indicates the second last element.

@param int $index The index.

@return bool True if the argument exists.
Returns true if the argument index exists .