amac(["1" "2"] ["." .] "a")

# (macro_call (@ 1 0-4) ‘amac’
#   (.arguments
#     (alternation (@ 1 5-6)
#       (.inner
#         (string (@ 1 6-9) ‘"1"’)
#         (string (@ 1 10-13) ‘"2"’)
#       )
#     )
#     (alternation (@ 1 15-16)
#       (.inner
#         (string (@ 1 16-19) ‘"."’)
#         (nothing (@ 1 20-21))
#       )
#     )
#     (string (@ 1 23-26) ‘"a"’)
#   )
# )