flagsGetValueByNick
Looks up a #GFlagsValue by nickname.
Return
the #GFlagsValue with nickname @nick, or null if there is no flag with that nickname
Parameters
flagsClass
a #GFlagsClass
nick
the nickname to look up
Looks up a #GFlagsValue by nickname.
the #GFlagsValue with nickname @nick, or null if there is no flag with that nickname
a #GFlagsClass
the nickname to look up