code: def invert_channels_intensity(
      metadata: Dict[str, Any], **kwargs
  ) -> float:
      return 0.0 if metadata["src_num_channels"] == 1 else 100.0
  
imports: from typing import Any, Callable, Dict, Optional, Tuple
  import numpy
label_desc: Use image node_id 9 for calling a global function with example usage: invert_channels_intensity(metadata) and returns: unknown