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function varargout = getoptkey(varargin)
%
% val=getoptkey(key,default,opt)
%
% query the value of a key from a structure or a list of key/value pairs
%
% author: Qianqian Fang, <q.fang at neu.edu>
%
% input:
% key: a string name for the target struct field name
% default: the default value of the key is not found
% opt: a struct object; the field names will be searched to match the
% key input, opt can be a list of 'keyname'/value pairs
%
% output:
% val: val=opt.key if found, otherwise val=default
%
% -- this function is part of iso2mesh toolbox (http://iso2mesh.sf.net)
%
[varargout{1:nargout}] = jsonopt(varargin{:});
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