Labels of the columns (groups 1..k-1).
Description of the tests (R's method).
Adjustment method.
Adjusted p-values as a lower-triangular table: row r compares group rowNames[r] with each group
colNames[c]; entries above the diagonal are NaN.
Labels of the rows (groups 2..k).
R's warnings, each once, in R's order (an empty array when there are none).
Result of the pairwise comparisons (R's
pairwise.htest).