GtkRcPropertyParser for use with gtkSettingsInstallPropertyParser
or gtkWidgetClassInstallStylePropertyParser which parses a
requisition in the form
"{ width, height }" for integers width and height.gtkRcPropertyParseRequisition(pspec, gstring)pspecgstringcharacter to be parsedTRUE if gstring could be parsed and property.value
has been set to the resulting GtkRequisition.property.valueR object which must hold boxed values.