Code clean up.

app/Models/Attachment.php

@@ -18,7 +18,6 @@
  * You should have received a copy of the GNU General Public License
  * along with Firefly III.  If not, see <http://www.gnu.org/licenses/>.
  */
-
 declare(strict_types=1);
 
 namespace FireflyIII\Models;
@@ -31,9 +30,7 @@ use Illuminate\Database\Eloquent\SoftDeletes;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
- * Class Attachment
- *
- * @package FireflyIII\Models
+ * Class Attachment.
  */
 class Attachment extends Model
 {
@@ -59,7 +56,7 @@ class Attachment extends Model
      *
      * @return Attachment
      */
-    public static function routeBinder(Attachment $value)
+    public static function routeBinder(self $value)
     {
         if (auth()->check()) {
             if (intval($value->user_id) === auth()->user()->id) {
@@ -96,7 +93,7 @@ class Attachment extends Model
      */
     public function getDescriptionAttribute($value)
     {
-        if (is_null($value) || strlen($value) === 0) {
+        if (null === $value || 0 === strlen($value)) {
             return null;
         }
 
@@ -110,7 +107,7 @@ class Attachment extends Model
      */
     public function getFilenameAttribute($value)
     {
-        if (is_null($value) || strlen($value) === 0) {
+        if (null === $value || 0 === strlen($value)) {
             return null;
         }
 
@@ -124,7 +121,7 @@ class Attachment extends Model
      */
     public function getMimeAttribute($value)
     {
-        if (is_null($value) || strlen($value) === 0) {
+        if (null === $value || 0 === strlen($value)) {
             return null;
         }
 
@@ -132,14 +129,13 @@ class Attachment extends Model
     }
 
     /**
-     *
      * @param $value
      *
      * @return null|string
      */
     public function getNotesAttribute($value)
     {
-        if (is_null($value) || strlen($value) === 0) {
+        if (null === $value || 0 === strlen($value)) {
             return null;
         }
 
@@ -147,14 +143,13 @@ class Attachment extends Model
     }
 
     /**
-     *
      * @param $value
      *
      * @return null|string
      */
     public function getTitleAttribute($value)
     {
-        if (is_null($value) || strlen($value) === 0) {
+        if (null === $value || 0 === strlen($value)) {
             return null;
         }