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