rem: if (value == null) throw 'Cannot put null values in the map'; 
add: if (value == null) return false; 
context: 	set: function(key, value) {		if (value == null) throw 'Cannot put null values in the map';		if (this.obj[key] == undefined) this.length++;		this.obj[key] = value;		return this;	},
meta: 6317	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/6317/fcc80ca504adb31cd63f24e4b73ce9e400a788bc/Hash.js/clean/Addons/Hash.js