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: isManifoldMesh.m
    path of file: ./repos/matGeom/matGeom/meshes3d
    
    the code of the file until where you have to start completion: function [b1, b2] = isManifoldMesh(varargin)
%ISMANIFOLDMESH Check whether the input mesh may be considered as manifold.
%
%   B = isManifoldMesh(V, F)
%   B = isManifoldMesh(V, E, F)
%   Checks if the specified mesh is a manifold. When mesh is a manifold,
%   all edges are connected to either 2 or 1 faces.
%
%   [B, HASBORDER] = isManifoldMesh(V, E, F)
%   Also checks whether the mesh contains border faces. Border faces
%   contains at least one edge which is ajacent to only one face.
%
%   Example
%     [V, F] = createOctahedron;
%     isManifoldMesh(V, F)
%     ans =
%       logical
%        1
%
%   See also 

    
function [b1, b2] = isManifoldMesh(varargin)
%ISMANIFOLDMESH Check whether the input mesh may be considered as manifold.
%
%   B = isManifoldMesh(V, F)
%   B = isManifoldMesh(V, E, F)
%   Checks if the specified mesh is a manifold. When mesh is a manifold,
%   all edges are connected to either 2 or 1 faces.
%
%   [B, HASBORDER] = isManifoldMesh(V, E, F)
%   Also checks whether the mesh contains border faces. Border faces
%   contains at least one edge which is ajacent to only one face.
%
%   Example
%     [V, F] = createOctahedron;
%     isManifoldMesh(V, F)
%     ans =
%       logical
%        1
%
%   See also 
%     meshes3d, ensureManifoldMesh, trimMesh

% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2019-01-31, using Matlab 9.5.0.944444 (R2018b)
% Copyright 2019-2023 INRA - Cepia Software Platform

vertices = varargin{1};
faces = varargin{2};

% compute edge to vertex array
if nargin == 3
    edges = faces;
    faces = varargin{3};
else
    % compute edge to vertex array
    edges = meshEdges(faces);
end