diff --git a/src/Analyze/EntityAnalyzer.php b/src/Analyze/EntityAnalyzer.php
index 22394d4..d40844a 100644
--- a/src/Analyze/EntityAnalyzer.php
+++ b/src/Analyze/EntityAnalyzer.php
@@ -85,7 +85,7 @@ readonly class EntityAnalyzer
         $idFields = array_filter($fields, static fn(EntityField $f) => $f->isIdField);
         $nrIdFields = count($idFields);
 
-        if ($nrIdFields !== 1) {
+        if ($nrIdFields === 0 || $nrIdFields > 1) {
             throw new InvalidEntity(
                 "Invalid number of id fields on entity $this->entity found: $nrIdFields, expected: 1"
             );
@@ -109,6 +109,7 @@ readonly class EntityAnalyzer
             $name = $param->getName();
         }
 
+        /** @var ReflectionClass<E> $refClass */
         $refClass = $param->getDeclaringClass();
         $readAccess = $this->readAccess($refClass, $param);
 
diff --git a/src/Sql/DataToEntityMapper.php b/src/Sql/DataToEntityMapper.php
index b611ab1..d90c789 100644
--- a/src/Sql/DataToEntityMapper.php
+++ b/src/Sql/DataToEntityMapper.php
@@ -36,38 +36,4 @@ readonly class DataToEntityMapper
         /** @var E */
         return new $this->entityResult->classFqcn(...$params);
     }
-
-    /**
-     * @param E $entity
-     * @param EntityField<object> $field
-     * @param object $value
-     */
-    private function getsetWrite(object $entity, EntityField $field, mixed $value): void
-    {
-        $setter = FieldAccess::setterName($field->name);
-        $entity->$setter($value);
-    }
-
-    /**
-     * @param E $entity
-     * @param EntityField<object> $field
-     * @param object $value
-     */
-    private function publicWrite(object $entity, EntityField $field, mixed $value): void
-    {
-        $entity->{$field->name} = $value;
-    }
-
-    /**
-     * @param E $entity
-     * @param EntityField<object> $field
-     * @param object $value
-     * @return E
-     */
-    private function witherWrite(object $entity, EntityField $field, mixed $value): object
-    {
-        $wither = FieldAccess::witherName($field->name);
-        /** @var E */
-        return $entity->$wither($value);
-    }
 }