function s = importEdge(file, name, phase1, phase2, phase3, phase4)
% IMPORTEDGE  Import edges between phases.
% s = importEdge(file, name, phase1, phase2, phase3, phase4)
% Supports up to four neighbor phases. See :ref:`sec-interfaces`
%
% :param file:
%     File containing phases
% :param name:
%     Name of phase
% :param phase1:
%     First neighbor phase
% :param phase2:
%     Second neighbor phase
% :param phase3:
%     Third neighbor phase
% :param phase4:
%     Fourth neighbor phase
% :return:
%     Instance of class :mat:func:`Interface`
%

if nargin == 3
    s = Interface(file, name, phase1);
elseif nargin == 4
    s = Interface(file, name, phase1, phase2);
elseif nargin == 5
    s = Interface(file, name, phase1, phase2, phase3);
elseif nargin == 6
    s = Interface(file, name, phase1, phase2, phase3, phase4);
else
    error('importEdge only supports 4 neighbor phases.');
end