code: def sgd():
      return SGD(0.001)
  
file_path: thinc/thinc/tests/layers/test_sparse_linear.py
imports: import math
  import numpy
  import pytest
  from thinc.api import SGD, SparseLinear, SparseLinear_v2, to_categorical
label_desc: Use image node_id 2 for calling a global function with example usage: sgd() and returns: SGD