public function bulk( $data ) {

		try {
			if ( ! isset( $data['customers'] ) ) {
				throw new WC_API_Exception( 'woocommerce_api_missing_customers_data', sprintf( __( 'No %1$s data specified to create/edit %1$s', 'woocommerce' ), 'customers' ), 400 );
			}

			$data  = $data['customers'];
			$limit = apply_filters( 'woocommerce_api_bulk_limit', 100, 'customers' );

			// Limit bulk operation
			if ( count( $data ) > $limit ) {
				throw new WC_API_Exception( 'woocommerce_api_customers_request_entity_too_large', sprintf( __( 'Unable to accept more than %s items for this request.', 'woocommerce' ), $limit ), 413 );
			}

			$customers = array();

			foreach ( $data as $_customer ) {
				$customer_id = 0;

				// Try to get the customer ID
				if ( isset( $_customer['id'] ) ) {
					$customer_id = intval( $_customer['id'] );
				}

				// Customer exists / edit customer
				if ( $customer_id ) {
					$edit = $this->edit_customer( $customer_id, array( 'customer' => $_customer ) );

					if ( is_wp_error( $edit ) ) {
						$customers[] = array(
							'id'    => $customer_id,
							'error' => array( 'code' => $edit->get_error_code(), 'message' => $edit->get_error_message() ),
						);
					} else {
						$customers[] = $edit['customer'];
					}
				} else {
					// Customer don't exists / create customer
					$new = $this->create_customer( array( 'customer' => $_customer ) );

					if ( is_wp_error( $new ) ) {
						$customers[] = array(
							'id'    => $customer_id,
							'error' => array( 'code' => $new->get_error_code(), 'message' => $new->get_error_message() ),
						);
					} else {
						$customers[] = $new['customer'];
					}
				}
			}

			return array( 'customers' => apply_filters( 'woocommerce_api_customers_bulk_response', $customers, $this ) );
		} catch ( WC_API_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}