refactor decorator to separate file

orm/fields/base.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, List, Optional, TYPE_CHECKING, Type
+from typing import Any, Dict, List, Optional, TYPE_CHECKING
 
 import sqlalchemy
 
@@ -8,27 +8,6 @@ if TYPE_CHECKING:  # pragma no cover
     from orm.models import Model
 
 
-class RequiredParams:
-    def __init__(self, *args: str) -> None:
-        self._required = list(args)
-
-    def __call__(self, model_field_class: Type["BaseField"]) -> Type["BaseField"]:
-        old_init = model_field_class.__init__
-        model_field_class._old_init = old_init
-
-        def __init__(instance: "BaseField", *args: Any, **kwargs: Any) -> None:
-            super(instance.__class__, instance).__init__(*args, **kwargs)
-            for arg in self._required:
-                if arg not in kwargs:
-                    raise ModelDefinitionError(
-                        f"{instance.__class__.__name__} field requires parameter: {arg}"
-                    )
-                setattr(instance, arg, kwargs.pop(arg))
-
-        model_field_class.__init__ = __init__
-        return model_field_class
-
-
 class BaseField:
     __type__ = None