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