antlr-beginning-of-rule is an interactive compiled Lisp function in `antlr-mode.el'.

(antlr-beginning-of-rule &optional ARG)

Move backward to preceding beginning of rule. Do it ARG many times.
A grammar class header and the file prelude are also considered as a
rule. Negative argument ARG means move forward to ARGth next beginning
of rule. If ARG is zero, run `antlr-beginning-of-body'.