code: def as_vec(x):
      warnings.warn(
          "chainer.utils.array.as_vec is deprecated. Please refer to "
          "numpy.ravel or other array backend functions to flatten ndarrays.",
          DeprecationWarning,
      )
      if x.ndim == 1:
          return x
      return x.ravel()
  
file_path: chainer/chainer/utils/array.py
imports: import warnings
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
label_desc: Use image node_id 1 for calling a global function with example usage: as_vec(x) and returns: x, x