Classes/ViewHelpers/ViewColumnViewHelper.php
protected function filterViewChildrenByViewColumn(array $viewChildren, int $viewColumn) {
    $result = [];

    if ($viewChildren) {
      foreach($viewChildren as $viewChild) {
        if (intval($viewChild['tx_gridelements_columns']) == $viewColumn) {
          $result[] = $viewChild;
        }
      }
    }

    return $result;
  }
protected function filterViewChildrenByViewColumn(array $viewChildren, int $viewColumn) {
    $result = [];

    if ($viewChildren) {
      foreach($viewChildren as $viewChild) {
        if (intval($viewChild['tx_gridelements_columns']) == $viewColumn) {
          $result[] = $viewChild;
        }
      }
    }

    return $result;
  }
Filters the view children by a view column.

@param array $viewChildren The view children
@param int $viewColumn The UID of the view column
@return array The filtered view children