calcBefore(prefixes, decl, prefix = '') {
    let max = this.maxPrefixed(prefixes, decl)
    let diff = max - utils.removeNote(prefix).length

    let before = decl.raw('before')
    if (diff > 0) {
      before += Array(diff).fill(' ').join('')
    }

    return before
  }
Calculate indentation to create visual cascade