protected function applyIncludes($dataTypes): array
    {
        $inclusions = explode(',', $this->include);
        // Find any invalid data to include.
        $invalidIncludes = array_diff($inclusions, $dataTypes);
        if (count($invalidIncludes) > 0) {
            $errorMessage = 'WARNING: Invalid include(s)';
            $errorMessage .= ': '.implode(', ', $invalidIncludes).'.'.PHP_EOL;
            $errorMessage .= ' Valid inclusions are '.implode(', ', $dataTypes);

            // Output an error message outlining what invalid exclusions were specified.
            Schematic::warning($errorMessage);
        }
        // Remove any explicitly included data types from the list of data types to export.
        return array_intersect($dataTypes, $inclusions);
    }