More code review

README.md

 # Migrate Devel
 
-Adds new options to `drush migrate-import` which allows developers to debug their migrations.
+Adds new options to `drush migrate-import` which 
+allows developers to debug their migrations.
 
 `drush migrate-import` comes from either the 
 [migrate_tools](https://www.drupal.org/project/migrate_tools) or the 
 [migrate_run](https://www.drupal.org/project/migrate_run) modules.
 
 Currently uses Kint (from devel) directly to print out debug information 
-instead of devel in order to take advantage of cli coloring and named variable debugging.
+instead of devel in order to take advantage of 
+cli coloring and named variable debugging.
 
 Options are:
 
 * `--migrate-debug` - Prints out rows as they run. 
-* `--migrate-debug-pre` - Same as above, but before the migration is run on the row.
+* `--migrate-debug-pre` - Same as above before the process is run on the row.

src/EventSubscriber/MigrationEventSubscriber.php

 <?php
-
+/**
+ * MigrationEventSubscriber for Debugging Migrations.
+ *
+ * @category Class
+ * @package  migrate_devel
+ */
 namespace Drupal\migrate_devel\EventSubscriber;
 
 use Drupal\migrate\Event\MigrateEvents;
@@ -11,6 +16,7 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  * MigrationEventSubscriber for Debugging Migrations.
  */
 class MigrationEventSubscriber implements EventSubscriberInterface {
+
   /**
    * Pre Row Save Function for --migrate-debug-pre.
    *
@@ -19,13 +25,14 @@ class MigrationEventSubscriber implements EventSubscriberInterface {
   public function debugRowPreSave(MigratePreRowSaveEvent $event) {
     $row = $event->getRow();
 
-    if (function_exists('drush_get_option') && drush_get_option('migrate-debug-pre')) {
+    $using_drush = function_exists('drush_get_option');
+    if ($using_drush && drush_get_option('migrate-debug-pre')) {
+      // Starting with capital letter for variables since this is actually a label.
       $Source = $row->getSource();
       $Destination = $row->getDestination();
 
       // We use kint directly here since we want to support variable naming and CLI colors.
       kint_require();
-      // Starting with capital letter for variables since this is actually a label.
       \Kint::dump($Source, $Destination);
     }
   }
@@ -38,14 +45,14 @@ class MigrationEventSubscriber implements EventSubscriberInterface {
   public function debugRowPostSave(MigratePostRowSaveEvent $event) {
     $row = $event->getRow();
 
-    if (function_exists('drush_get_option') && drush_get_option('migrate-debug')) {
+    $using_drush = function_exists('drush_get_option');
+    if ($using_drush && drush_get_option('migrate-debug')) {
+      // We use kint directly here since we want to support variable naming and CLI colors.
       $Source = $row->getSource();
       $Destination = $row->getDestination();
       $DestinationIDValues = $event->getDestinationIdValues();
 
-      // We use kint directly here since we want to support variable naming and CLI colors.
       kint_require();
-      // Starting with capital letter for variables since this is actually a label.
       \Kint::dump($Source, $Destination, $DestinationIDValues);
     }
   }