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stextGrob(label, r = 0.1, x = unit(0.5, "npc"), y = unit(0.5, "npc"), just = "centre", hjust = NULL, vjust = NULL, rot = 0, check.overlap = FALSE, default.units = "npc", name = NULL, gp = gpar(), vp = NULL)
grid.rect(gp=gpar(fill="grey")) stextGrob("test")
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