Is it possible to combine two transformations?

Setup, Configuration and Use Items & Sitemaps
7

I did test with success (as a *.things definition):

        Type color  : col "Color"      [ colorMode="XYY", commandTopic="test/zigbee2mqtt/p3z/set", stateTopic="test/zigbee2mqtt/p3z", 
        transformationPatternOut="DSL:|val col = input.split(',') var my = '{\"brightness\": ' + (Float.parseFloat(col.get(2))*255/100).toString + ', \"color\": {\"x\": ' + col.get(0)  + ',\"y\": ' + col.get(1) + '}}' my", 
        transformationPattern="DSL:|transform('JSONPATH','$.color.x',input) + ',' + transform('JSONPATH','$.color.y',input) + ',' + (Integer.parseInt(transform('JSONPATH','$.brightness',input))*100/255)" ]

or (the same) as yaml code:

channels:
  - id: col
    channelTypeUID: mqtt:color
    label: Color
    description: null
    configuration:
      retained: false
      postCommand: false
      transformationPatternOut: "DSL:|val col = input.split(',') var my =
        '{\"brightness\": ' + (Float.parseFloat(col.get(2))*255/100).toString +
        ', \"color\": {\"x\": ' + col.get(0)  + ',\"y\": ' + col.get(1) + '}}'
        my"
      formatBeforePublish: "%s"
      commandTopic: test/zigbee2mqtt/p3z/set
      colorMode: XYY
      stateTopic: test/zigbee2mqtt/p3z
      transformationPattern: DSL:|transform('JSONPATH','$.color.x',input) + ',' +
        transform('JSONPATH','$.color.y',input) + ',' +
        (Integer.parseInt(transform('JSONPATH','$.brightness',input))*100/255)