code: def c(*args):  # pylint: disable=invalid-name
      """Concatenate columns into a 2D NumPy Array"""
      return np.column_stack(args)
  
file_path: bambi/bambi/transformations.py
imports: import numpy
  import pandas
  from formulae.transforms import register_stateful_transform
label_desc: Use image node_id 1 for calling a global function with example usage: c() and returns: np