code: function mxConnectionConstraint(point, perimeter, name, dx, dy)
  {
  	this.point = point;
  	this.perimeter = (perimeter != null) ? perimeter : true;
  	this.name = name;
  	this.dx = dx? dx : 0;
  	this.dy = dy? dy : 0;
  }
docs: Copyright (c) 2006-2015, JGraph Ltd
  Copyright (c) 2006-2015, Gaudenz Alder
   
  Class: mxConnectionConstraint
  
  Defines an object that contains the constraints about how to connect one
  side of an edge to its terminal.
  
  Constructor: mxConnectionConstraint
  
  Constructs a new connection constraint for the given point and boolean
  arguments.
  
  Parameters:
  
  point - Optional <mxPoint> that specifies the fixed location of the point
  in relative coordinates. Default is null.
  perimeter - Optional boolean that specifies if the fixed point should be
  projected onto the perimeter of the terminal. Default is true.