code: def scatter_add(x, idx, m):
      scatter_add_op = ScatterAdd(idx, m)
      return scatter_add_op(x)
  
imports: import mxnet
  import numpy
  from mxnet import nd
  from ..._sparse_ops import _bwd_segment_cmp, _csrmask, _csrmm, _csrsum, _gsddmm, _gspmm, _scatter_add, _segment_reduce
  from ...base import ALL, dgl_warning, is_all
  from ...heterograph_index import create_unitgraph_from_csr
  from .tensor import asnumpy, context, copy_to, to_backend_ctx, zerocopy_from_numpy
label_desc: Use image node_id 12 for calling a global function with example usage: scatter_add(x, idx, m) and returns: scatter_add_op