c_g_param_spec_long

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
GParamSpec* function(const(char)* name, const(char)* nick, const(char)* blurb, glong minimum, glong maximum, glong defaultValue, GParamFlags flags) c_g_param_spec_long;

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