[ROS2] How to get multiple nodes under same namespace in yaml config file?

edit

Hello,

I have a config yaml that looks as follows:

sensor_set_1:
  depth_camera:
    ros__parameters:
      usb_port_id: '2-1.4.1'
sensor_set_1:
  rgb_camera:
    ros__parameters:
      usb_port_id: '2-1.4.2'

When launching both nodes depth_camera and rgb_camera in the namespace sensor_set_1 when supply the above yaml file, the usb_port_id gets load correctly for both nodes. The problem is that when I run the pre-commit hook containing a yaml check, i get the following error:

- hook id: check-yaml
- exit code: 1

while constructing a mapping
  in "src/bot_bringup/config/sensor_sets.yaml", line 1, column 1
found duplicate key "sensor_set_1" with value "{}" (original value: "{}")
  in "src/bot_bringup/config/sensor_sets.yaml", line 5, column 1

However when I use the following format:

sensor_set_1:
  depth_camera:
    ros__parameters:
      usb_port_id: '2-1.4.1'
  rgb_camera:
    ros__parameters:
      usb_port_id: '2-1.4.2'

The parameter for rgb_camera no longer gets loaded! I think it looks cleaner to use the above yaml instead of the first one since the indentation indicates that depth and rgb camera are in the sensor_set_1 namespace.

How do I format the yaml properly in order to get this to work? Or is my intended approach not usable for ROS2?

Thanks in advance!