
{{alias}}( arrays, shapes, fcn )
    Applies a ternary callback to elements in three broadcasted input arrays and
    assigns results to elements in a four-dimensional nested output array.

    Parameters
    ----------
    arrays: ArrayLikeObject
        Array-like object containing three input nested arrays and one output
        nested array.

    shapes: Array<Array<integer>>
        Array shapes.

    fcn: Function
        Ternary callback.

    Examples
    --------
    > function fcn( x, y, z ) { return x + y + z };
    > var x = [ [ [ 1.0 ] ] ];
    > var y = [ [ [ 2.0, 3.0 ] ] ];
    > var z = [ [ [ [ 4.0, 5.0 ] ] ] ];
    > var out = [ [ [ [ 0.0, 0.0 ], [ 0.0, 0.0 ] ] ] ];
    > var shapes =[ [ 1, 1, 1 ], [ 1, 1, 2 ], [ 1, 1, 1, 2 ], [ 1, 1, 2, 2 ] ];
    > {{alias}}( [ x, y, z, out ], shapes, fcn );
    > out
    [ [ [ [ 7.0, 9.0 ], [ 7.0, 9.0 ] ] ] ]

    See Also
    --------

