Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Cell/Cell.php
public function isMergeRangeValueCell()
    {
        if ($mergeRange = $this->getMergeRange()) {
            $mergeRange = Coordinate::splitRange($mergeRange);
            list($startCell) = $mergeRange[0];
            if ($this->getCoordinate() === $startCell) {
                return true;
            }
        }

        return false;
    }
public function isMergeRangeValueCell()
    {
        if ($mergeRange = $this->getMergeRange()) {
            $mergeRange = Coordinate::splitRange($mergeRange);
            list($startCell) = $mergeRange[0];
            if ($this->getCoordinate() === $startCell) {
                return true;
            }
        }

        return false;
    }
public function isMergeRangeValueCell ( ) { if ( $ mergeRange = $ this -> getMergeRange ( ) ) { $ mergeRange = Coordinate :: splitRange ( $ mergeRange ) ; list ( $ startCell ) = $ mergeRange [ 0 ] ; if ( $ this -> getCoordinate ( ) === $ startCell ) { return true ; } } return false ; }
Is this cell the master (top left cell) in a merge range (that holds the actual data value).

@return bool
Is this cell the master ( top left cell ) in a merge range ( that holds the actual data value ) .