glib GVariant 3

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GVariant *value1, *value2, *value3, *value4;   value1 = g_variant_new ("y", 200); value2 = g_variant_new ("b", TRUE); value3 = g_variant_new ("d", 37.5); value4 = g_variant_new ("x", G_GINT64_CONSTANT (998877665544332211));        gdouble floating;   gboolean truth;   gint64 bignum;       g_variant_get (value1, "y", NULL);      /* ignore the value. */   g_variant_get (value2, "b", &truth);   g_variant_get (value3, "d", &floating);   g_variant_get (value4, "x", &bignum);   g_message ("%d, %f, %d", truth, floating, bignum);