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: Lipschitz.m
    path of file: ./repos/Performance-Estimation-Toolbox/Operator_classes
    
    the code of the file until where you have to start completion: function cons=Lipschitz(pt1,pt2,L)
%
% This routine implements the interpolation conditions for Lipschitz
% operators (nonexpansive operators by setting L=1)
%
% To generate a 2-Lipschitz operator 'h' from an instance of PEP called P:
%  >> P=pep();
%  >> param.L = 2;
%  >> h=P.AddObjective('Lipschitz',param);
%
%  **********************************************************************
%  NOTE: PESTO was initially though for evaluating performances of

    
function cons=Lipschitz(pt1,pt2,L)
%
% This routine implements the interpolation conditions for Lipschitz
% operators (nonexpansive operators by setting L=1)
%
% To generate a 2-Lipschitz operator 'h' from an instance of PEP called P:
%  >> P=pep();
%  >> param.L = 2;
%  >> h=P.AddObjective('Lipschitz',param);
%
%  **********************************************************************
%  NOTE: PESTO was initially though for evaluating performances of
%  optimization algorithms. Operators are represented in the same way as
%  functions, but function values are not accessible.
%  **********************************************************************
%
% For details about interpolation conditions, we refer to the following:
%
% (1) E. K. Ryu, A. B. Taylor, C. Bergeling, and P. Giselsson, 
% "Operator Splitting Performance Estimation: Tight contraction factors 
%  and optimal parameter selection," arXiv:1812.00146, 2018.
%
%

assert(L>0,'Constants provided to the operator class are not valid');
if ~(pt1.x.isEqual(pt2.x) && pt1.g.isEqual(pt2.g))
    cons=((pt2.g-pt1.g)^2- L^2 *(pt2.x-pt1.x)^2<=0);
else
    cons=[];
end