code: def round(x):
      return x
  
file_path: mystic/examples2/integer_programming_alt.py
imports: from integer_programming import objective, bounds, xs, ys
  from mystic.penalty import quadratic_inequality, quadratic_equality
  from mystic.constraints import as_constraint, discrete
  from mystic.constraints import integers
label_desc: Use image node_id 5 for calling a global function with example usage: round(x) and returns: x