Cache isObject() result in local variable to avoid redundant computation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

src/Type/Php/SetTypeFunctionTypeSpecifyingExtension.php

@@ -77,9 +77,10 @@ public function specifyTypes(FunctionReflection $functionReflection, FuncCall $n
 					$types[] = $valueType->toArray();
 					break;
 				case 'object':
-					if ($valueType->isObject()->yes()) {
+					$isObject = $valueType->isObject();
+					if ($isObject->yes()) {
 						$types[] = $valueType;
-					} elseif ($valueType->isObject()->no()) {
+					} elseif ($isObject->no()) {
 						$types[] = new ObjectType(stdClass::class);
 					} else {
 						$types[] = TypeCombinator::union(