$$$array(4) {
  ["preprocessorStrategy"]=>
  array(1) {
    ["class"]=>
    string(68) "Magento\Developer\Model\View\Asset\PreProcessor\PreprocessorStrategy"
  }
  ["variable_notation"]=>
  array(2) {
    ["after"]=>
    string(20) "preprocessorStrategy"
    ["class"]=>
    string(58) "Magento\Framework\View\Asset\PreProcessor\VariableNotation"
  }
  ["module_notation"]=>
  array(2) {
    ["after"]=>
    string(17) "variable_notation"
    ["class"]=>
    string(56) "Magento\Framework\View\Asset\PreProcessor\ModuleNotation"
  }
  ["css_min"]=>
  array(2) {
    ["after"]=>
    string(15) "module_notation"
    ["class"]=>
    string(24) "cssMinificationProcessor"
  }
}