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: Interpolator.m
    path of file: ./repos/Swan/FEM/Interpolation
    
    the code of the file until where you have to start completion: classdef Interpolator < handle

    properties (Access = private)
        mesh
        interpolation
        cellFinder
        zGrid
        zVal
    
function xN = computeZvalues(obj,x)
            nC = size(x,3);            
            x = permute(x,[2 1 3]);
            x = reshape(x,[],nC);
            nodes = obj.cellFinder.cells;
            [nelem,nnode] = size(nodes);
            xNode = x(nodes(:),:);
            xN = reshape(xNode,nelem,nnode,nC);
        end