code: function mxGeometryChange(model, cell, geometry)
  {
  	this.model = model;
  	this.cell = cell;
  	this.geometry = geometry;
  	this.previous = geometry;
  }
docs: Class: mxGeometryChange
  
  Action to change a cell's geometry in a model.
  
  Constructor: mxGeometryChange
  
  Constructs a change of a geometry in the
  specified model.