function concat1d_(tensors) {
    return (0, _concat.concat)(tensors, 0 /* axis */ );
}
Concatenates a list of`tf.Tensor1D`s along an axis. See `concat` for details.

For example, if:
A: shape(3) = |r1, g1, b1|
B: shape(2) = |r2, g2|
C = tf.concat1d([A, B]) == |r1, g1, b1, r2, g2|

@param tensors A list of`tf.Tensor`s to concatenate.
@return The concatenated array.