tf.contrib.kfac.utils.mat2d_to_layer_params( vector_template, mat2d )
Converts a canonical 2D matrix representation back to a vector.
vector_template: A Tensor or pair of Tensors shaped like layer parameters.
mat2d: A 2D Tensor with the same shape as the value of layer_params_to_mat2d(vector_template).
A Tensor or pair of Tensors with the same coefficients as mat2d and the same shape as vector_template.