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: treeview.m
    path of file: ./repos/MatlabGDSPhotonicsToolbox/Functions/GDSII Library/Basic/@gds_library
    
    the code of the file until where you have to start completion: function treeview(glib);
%function treeview(glib);
%
% treeview - display the structure hierarchy graph
%            of the structures contained in a gds_library
%            object.
%
% glib :  a gds_library object
%

% initial version, Ulf Griesmann, NIST, December 2011

% calculate the adjacency matrix of the structure tree
[A,N] = adjmatrix(glib.st);

% find top level structure(s) - they have no parents
pai = find(sum(A)==0);  % top parent index (or indices)

% display names beginning with the top
display_tree(A, N, pai, 0);

return

function display_tree(A, N, pai, indent);
%
% Function, called recursively, to display the structure 
% tree described by an adjacency matrix.
%
for p = pai


    
function treeview(glib);
%function treeview(glib);
%
% treeview - display the structure hierarchy graph
%            of the structures contained in a gds_library
%            object.
%
% glib :  a gds_library object
%

% initial version, Ulf Griesmann, NIST, December 2011

% calculate the adjacency matrix of the structure tree
[A,N] = adjmatrix(glib.st);

% find top level structure(s) - they have no parents
pai = find(sum(A)==0);  % top parent index (or indices)

% display names beginning with the top
display_tree(A, N, pai, 0);

return

function display_tree(A, N, pai, indent);
%
% Function, called recursively, to display the structure 
% tree described by an adjacency matrix.
%
for p = pai

   % print parent name
   if indent
      blank(1:indent) = ' ';
      fprintf('%s%s\n', blank, N{p}); % parent
   else
      fprintf('%s\n', N{p}); % parent
   end