Function getColumn

spec/utils/index.js:122–128

(colNumber)

        return newColumn;
      },
      getColumn(colNumber) {
        let column = this.columns[colNumber - 1] || this._keys[colNumber];
        if (!column) {
          column = this.columns[colNumber - 1] = new Column(this, colNumber);
        }
        return column;
      },
      getRow(rowNumber) {
        let row = this.rows[rowNumber - 1];
        if (!row) {