code: def mom_nc2(x):
      return x * x
  
file_path: statsmodels/statsmodels/sandbox/distributions/tests/check_moments.py
imports: import numpy
  from scipy import stats
  from statsmodels.sandbox.distributions.sppatch import expect_v2
  from .distparams import distcont
label_desc: Use image node_id 5 for calling a global function with example usage: mom_nc2(x) and returns: unknown