code: def test_label_context_wrap2vars():
      p = g + facet_wrap("~ gear + am", labeller="label_context")
  
      assert p == "label_context_wrap2vars"
  
file_path: plotnine/tests/test_facet_labelling.py
imports: from plotnine import aes, as_labeller, facet_grid, facet_wrap, geom_point, ggplot, labeller
  from plotnine.data import mtcars
label_desc: Use image node_id 5 for calling a global function with example usage: test_label_context_wrap2vars() without return types