Piwik\Plugins\API\ProcessedReport::removeEmptyColumns PHP Method

    private function removeEmptyColumns(&$columns, &$reportMetadata, $dataTable)
    {
        $emptyColumns = $dataTable->getMetadata(DataTable::EMPTY_COLUMNS_METADATA_NAME);
        if (!is_array($emptyColumns)) {
            return;
        }
        $columnsToRemove = $this->getColumnsToRemove();
        $columnsToKeep = $this->getColumnsToKeep();
        $columns = $this->hideShowMetricsWithParams($columns, $columnsToRemove, $columnsToKeep, $emptyColumns);
        if (isset($reportMetadata['metrics'])) {
            $reportMetadata['metrics'] = $this->hideShowMetricsWithParams($reportMetadata['metrics'], $columnsToRemove, $columnsToKeep, $emptyColumns);
        }
        if (isset($reportMetadata['metricsDocumentation'])) {
            $reportMetadata['metricsDocumentation'] = $this->hideShowMetricsWithParams($reportMetadata['metricsDocumentation'], $columnsToRemove, $columnsToKeep, $emptyColumns);
        }
    }