to_dict improvment and add display_name parameter to change impl_get_display_name function

tests/test_option_validator.py

@@ -1,4 +1,4 @@
-from .autopath import do_autopath
+1rom .autopath import do_autopath
 do_autopath()
 from .config import config_type, get_config
 
@@ -127,6 +127,14 @@ def test_validator(config_type):
         cfg.option('opt2').value.set('val')
     assert len(w) == 1
     assert str(w[0].message) == msg
+    with warnings.catch_warnings(record=True) as w:
+        cfg.option('opt2').value.get()
+    assert len(w) == 1
+    assert str(w[0].message) == msg
+    with warnings.catch_warnings(record=True) as w:
+        cfg.option('opt2').value.get()
+    assert len(w) == 1
+    assert str(w[0].message) == msg
 
 
 def test_validator_params(config_type):