Reduce.fibers: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/autograd/reduce.bend as Reduce
Lines 180-183 of bendtorch-core@0.1.0.0/src/autograd/reduce.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/autograd/reduce.bend&start_line=180&end_line=183

import Base

# Each thread below the forks reads its own copy.
def fibers(+given: Fibers) -> Fibers:
  Fibers{+rows, +extents} = given
  Fibers{rows, extents}

Uses (1):
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/reduce.bend&name=Fibers