| LDTP
    3.5.0
    | 
expandtablecell('<window name>', '<tree table object name>', <row>)
Expand or contract the tree table cell on a row
| 1 | on success, LdtpExecutionError exception on failure | 
Refer: Linux: http://cgit.freedesktop.org/ldtp/ldtp2/tree/ldtpd/table.py
Windows: https://github.com/ldtp/cobra/blob/master/Ldtpd/Tree.cs
With respect to Evolution Mail component
from ldtp import *
expandtablecell('frm*-Evolution', 'ttblMailFolderTree', 0) # In mail folder view