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: FilterP0.m
    path of file: ./repos/Swan/Topology Optimization/Filters
    
    the code of the file until where you have to start completion: classdef FilterP0 < handle
    
   properties (Access = private)
       levelSet
       levelSet0
       dens0
   end
    
   me
    
function computeElementalLevelSet(obj,d)
            shape = d.shape;
            conec = d.conec;
            quadr = d.quadr;
            ngaus = quadr.ngaus;
            nelem = size(conec,1);
            nnode = size(shape,1);
            
            phiP0 = zeros(nelem,ngaus);
            phi   = obj.levelSet;
            for igaus = 1:ngaus
                for inode = 1:nnode
                    nodes = conec(:,inode);
                    phiN = phi(nodes);
                    phiP0(:,igaus) = phiP0(:,igaus) + shape(inode,igaus)*phiN;
                end