find(pattern, replacement) {
        pattern = regexify(pattern);

        const matches = [];
        this._cells.forEach(cell => {
            if (!cell) return;
            if (cell.find(pattern, replacement)) matches.push(cell);
        });

        return matches;
    }
Find a pattern in the row and optionally replace it.
@param {string|RegExp} pattern - The search pattern.
@param {string} [replacement] - The replacement text.
@returns {Array.<Cell>} The matched cells.
@ignore