Snake case building block names

official/vision/beta/projects/yolo/common/registry_imports.py

@@ -20,7 +20,7 @@ from official.utils.testing import mock_task
 from official.vision import beta
 
 from official.vision.beta.projects import yolo
-from official.vision.beta.projects.yolo.modeling.backbones import Darknet
+from official.vision.beta.projects.yolo.modeling.backbones import darknet
 from official.vision.beta.projects.yolo.configs import darknet_classification
 
 from official.vision.beta.projects.yolo.configs.darknet_classification import image_classification

official/vision/beta/projects/yolo/modeling/building_blocks/__init__.py

-from ._DarkConv import DarkConv
-from ._DarkResidual import DarkResidual
-from ._DarkTiny import DarkTiny
-from ._CSPConnect import CSPConnect
-from ._CSPDownSample import CSPDownSample
-from ._CSPTiny import CSPTiny
+from .dark_conv import DarkConv
+from .dark_residual import DarkResidual
+from .dark_tiny import DarkTiny
+from .csp_connect import CSPConnect
+from .csp_downsample import CSPDownSample
+from .csp_tiny import CSPTiny