Load one observing mdode

def load_mode(node):
    """Load one observing mdode"""
    obs_mode = ObservingMode()
    obs_mode.__dict__.update(node)

    # handle validator
    load_mode_validator(obs_mode, node)

    # handle builder
    load_mode_builder(obs_mode, node)

    # handle tagger:
    load_mode_tagger(obs_mode, node)

    return obs_mode