quarkFromString
Gets the #GQuark identifying the given string. If the string does not currently have an associated #GQuark, a new #GQuark is created, using a copy of the string.
This function must not be used before library constructors have finished running. In particular, this means it cannot be used to initialize global variables in C++.
Return
the #GQuark identifying the string, or 0 if @string is null
Parameters
string
a string