code: def avg_gpu_time(self):
      return self.gpu_time / self.call
  
imports: import collections
  from .utils import merge_ranges
  from .utils import merge_self_ranges
  from .utils import rebuild_node_trees
  from .utils import sum_ranges
  from .utils import traverse_tree
label_desc: Use image node_id 3 for calling the ModelPerspectiveItem obj's underlying member method code with example usage: obj.avg_gpu_time() and returns: unknown