在双向门控循环单元中需要翻转层，请用MATLAB编写一个翻转层

双向门控循环单元的翻转层可以通过MATLAB代码实现如下：

function flippedLayer = flipBiGRULayer(layer)
%FLIPBIGRULAYER Flips a bidirectional GRU layer.
%   FLIPPEDLAYER = FLIPBIGRULAYER(LAYER) takes a bidirectional GRU layer
%   LAYER and returns a new layer FLIPPEDLAYER with the same hyperparameters
%   and weights as LAYER but with the forward and backward layers flipped.
%   Only the hidden state size, input size, and number of output features
%   are preserved. The new layer is suitable for use with the sequence input
%   layer to create a backward pass through a bidirectional GRU network.
%
%   Example:
%       % Create a bidirectional GRU layer and flip it.
%       layer = biGRULayer(128, 'OutputMode', 'last');
%       flippedLayer = flipBiGRULayer(layer);
%
%   See also biGRULayer, sequenceInputLayer.

    % Create a copy of the input layer with the same hyperparameters.
    flippedLayer = copy(layer);

    % Flip the forward and backward layers.
    flippedLayer.ForwardLayer = flip(layer.BackwardLayer);
    flippedLayer.BackwardLayer = flip(layer.ForwardLayer);

    % Update the layer name.
    flippedLayer.Name = [layer.Name '_flipped'];
end

此代码会将输入的双向门控循环单元层对象进行复制，并将其中的前向和后向层进行翻转，生成一个新的翻转层对象返回。