 # standard non-SMC libraries
 immutable = require('immutable')
 {IS_MOBILE} = require('./feature')
+underscore = require('underscore')
 
 # SMC libraries
 {Avatar, UsersViewingDocument} = require('./profile')

            # Up arrow on an empty input
            @props.actions.set_to_last_input()

    send_chat: (e) ->
        @scroll_to_bottom()
        e.preventDefault()

            saved_position : rtypes.number
            height         : rtypes.number
            offset         : rtypes.number
            #edited_input   : rtypes.string
        users :
            user_map : rtypes.immutable
        account :
