indexOfStylename:function(a,b){if(null!=a&&null!=b){a=a.split(";");for(var c=0,d=0;d<a.length;d++){if(a[d]==b)return c;c+=a[d].length+1}}return-1},addStylename:function(a,b){0>mxUtils.indexOfStylename(a,b)&&(null==a?a="":0<a.length&&";"!=a.charAt(a.length-1)&&(a+=";"),a+=b);return a},removeStylename:function(a,b){var c=[];if(null!=a){a=a.split(";");for(var d=0;d<a.length;d++)a[d]!=b&&c.push(a[d])}return c.join(";")},removeAllStylenames:function(a){var b=[];if(null!=a){a=a.split(";");for(var c=0;c<