def ConvCnstrMODMaskDcpl(*args, **kwargs):
    """A wrapper function that dynamically defines a class derived from
    one of the implementations of the Convolutional Constrained MOD
    with Mask Decoupling problems, and returns an object instantiated
    with the provided. parameters. The wrapper is designed to allow the
    appropriate object to be created by calling this function using the
    same syntax as would be used if it were a class. The specific
    implementation is selected by use of an additional keyword
    argument 'method'. Valid values are:

    - ``'ism'`` :
      Use the implementation defined in :class:`.ConvCnstrMODMaskDcpl_IterSM`.
      This method works well for a small number of training images, but is
      very slow for larger training sets.
    - ``'cg'`` :
      Use the implementation defined in :class:`.ConvCnstrMODMaskDcpl_CG`.
      This method is slower than ``'ism'`` for small training sets, but has
      better run time scaling as the training set grows.
    - ``'cns'`` :
      Use the implementation defined in
      :class:`.ConvCnstrMODMaskDcpl_Consensus`. This method is the best choice
      for large training sets.

    The default value is ``'cns'``.
    """

    # Extract method selection argument or set default
    if 'method' in kwargs:
        method = kwargs['method']
        del kwargs['method']
    else:
        method = 'cns'

    # Assign base class depending on method selection argument
    if method == 'ism':
        base = ConvCnstrMODMaskDcpl_IterSM
    elif method == 'cg':
        base = ConvCnstrMODMaskDcpl_CG
    elif method == 'cns':
        base = ConvCnstrMODMaskDcpl_Consensus
    else:
        raise ValueError('Unknown ConvCnstrMODMaskDcpl solver method %s'
                         % method)

    # Nested class with dynamically determined inheritance
    class ConvCnstrMODMaskDcpl(base):
        def __init__(self, *args, **kwargs):
            super(ConvCnstrMODMaskDcpl, self).__init__(*args, **kwargs)

    # Allow pickling of objects of type ConvCnstrMODMaskDcpl
    _fix_dynamic_class_lookup(ConvCnstrMODMaskDcpl, method)

    # Return object of the nested class type
    return ConvCnstrMODMaskDcpl(*args, **kwargs)