You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: transparency_change.m
    path of file: ./repos/CanlabCore/CanlabCore/@fmridisplay
    
    the code of the file until where you have to start completion: function transparency_change(o2, multval)
% Change the transparency of blobs in an fmridisplay object
%
% :Inputs:
%
%   **multval:**
%        multiply transparency values by this.
%
% values < 1 makes blobs more transparent, > 1 makes blobs more opaque

for m = 1:length(o2.activation_maps)
    
    h = o2.activation_maps{m}.blobhandles;
    

    
function transparency_change(o2, multval)
% Change the transparency of blobs in an fmridisplay object
%
% :Inputs:
%
%   **multval:**
%        multiply transparency values by this.
%
% values < 1 makes blobs more transparent, > 1 makes blobs more opaque

for m = 1:length(o2.activation_maps)
    
    h = o2.activation_maps{m}.blobhandles;
    
    for i = 1:length(h)
        
        d1 = get(h(i), 'AlphaData');
        
        d1 = d1 .* multval;
        
        d1(d1 > 1) = 1;
        
        set(h(i), 'AlphaData', d1);
        
    end