```coffeescript
Declaration = require('../declaration')

class Filter extends Declaration
  @names = ['filter']

  # Check is it Internet Explorer filter
  check: (decl) ->
    v = decl.value
    v.toLowerCase().indexOf('alpha(') == -1 and v.indexOf('DXImageTransform.Microsoft') == -1

module.exports = Filter
```

Fix Holy 80 columns line
user
```coffeescript
Declaration = require('../declaration')

class Filter extends Declaration
  @names = ['filter']

  # Check is it Internet Explorer filter
  check: (decl) ->
    v = decl.value
    v.toLowerCase().indexOf('alpha(') == -1 and
      v.indexOf('DXImageTransform.Microsoft') == -1

module.exports = Filter
```
assistant