```
# NOT RUN {
## qc
qc(a, b, c)
identical(qc(a, b, c), c("a", "b", "c"))
mtcars[, qc(am, mpg, gear)]
## text_expand
i = 1:5
text_expand("q{i}")
i = 1:3
j = 1:3
text_expand("q1_{i}_{j}")
data(iris)
text_expand("'iris' has {nrow(iris)} rows.")
## qe
qe(mrset(a1 %to% a6), mrset(b1 %to% b6), mrset(c1 %to% c6))
# }
```

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