code: def sum_outgrads(gs):
      return reduce(add_outgrads, gs, None)[0]
  
imports: from itertools import count
  from functools import reduce
  from .tracer import trace, primitive, toposort, Node, Box, isbox, getval
  from .util import func, subval
  import warnings
label_desc: Use image node_id 14 for calling a global function with example usage: sum_outgrads(gs) and returns: reduce