WordPress at a glance
filter is not described

woocommerce_csv_product_import_mapped_columns filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_csv_product_import_mapped_columns', 'filter_function_name_9544', 10, 2 );
function filter_function_name_9544( $headers, $raw_headers ){
	// filter...

	return $headers;
}
$headers
-
$raw_headers
-

Where the hook is called

WC_Product_CSV_Importer_Controller::auto_map_columns()
woocommerce_csv_product_import_mapped_columns
woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php 599
return apply_filters( 'woocommerce_csv_product_import_mapped_columns', $headers, $raw_headers );

Where in WP core the hook is used WooCommerce

woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php 164
add_filter( 'woocommerce_csv_product_import_mapped_columns', array( $this, 'auto_map_user_preferences' ), 9999 );