I have been searching for a way of achieving this but so far no luck. I have also looked through the core and found where it is called (
vendor\magento\module-import-export\Controller\Adminhtml\Import\Start.php) but can't work out where to define the CSV file to import.
I know I need to pass data to it like so:
Array ( [form_key] => 123456789xyz [entity] => catalog_product [behavior] => append [validation_strategy] => validation-stop-on-errors [allowed_error_count] => 10 [_import_field_separator] => , [_import_multiple_value_separator] => , [import_images_file_dir] => )
Any one have any hints as to how I can run the native CSV import via code?