Reduce "Cannot access property" errors detected by PHPStan

src/Supporting/FileMakerRelation.php

@@ -12,8 +12,8 @@
  *
  * @package INTER-Mediator\FileMakerServer\RESTAPI
  * @link https://github.com/msyk/FMDataAPI GitHub Repository
  * @property string $<<field_name>> The field value named as the property name.
  * @property FileMakerRelation $<<portal_name>> FileMakerRelation object associated with the property name.
  *    The table occurrence name of the portal can be the 'portal_name,' and also the object name of the portal.
  * @version 32
  * @author Masayuki Nii <[email protected]>
@@ -107,7 +107,7 @@
      */
     public function getTargetTable(): null|string
     {
-        return ($this->dataInfo) ? $this->dataInfo->table : null;
+        return $this->dataInfo->table ?? null;
     }
 
     /**
@@ -118,8 +118,7 @@
      */
     public function getTotalCount(): null|int
     {
-        return ($this->dataInfo && property_exists($this->dataInfo, 'totalRecordCount')) ?
-            $this->dataInfo->totalRecordCount : null;
+        return $this->dataInfo->totalRecordCount ?? null;
     }
 
     /**
@@ -131,7 +130,7 @@
      */
     public function getFoundCount(): null|int
     {
-        return ($this->dataInfo) ? $this->dataInfo->foundCount : null;
+        return $this->dataInfo->foundCount ?? null;
     }
 
     /**
@@ -143,7 +142,7 @@
      */
     public function getReturnedCount(): null|int
     {
-        return ($this->dataInfo) ? $this->dataInfo->returnedCount : null;
+        return $this->dataInfo->returnedCount ?? null;
     }
 
     /**
@@ -362,7 +361,7 @@
                     break;
                 case 'RECORD':
                     if (property_exists($this->data, 'portalData')) {
                         foreach ($this->data->portalData as $name => $val) {
                             $list[] = $name;
                         }
                     }