code: function _children (options) {
    if (!this.id) return []
    var min = options.hash.min
    delete options.hash.min
    options.hash.memberof = this.id
    var output = _identifiers(options)
    output = output.filter(function (identifier) {
      if (identifier.kind === 'external') {
        return identifier.description && identifier.description.length > 0
      } else {
        return true
      }
    })
    if (output.length >= (min || 0)) return output
  }
docs: return the identifiers which are a `memberof` this one. Exclude externals without descriptions.
  @param [sortBy] {string} - "kind"
  @param [min] {number} - only returns if there are `min` children
  @this {identifier}
  @returns {identifier[]}
  @static