def _nt_labeled_sequence_primary
start_index = index
if node_cache[:labeled_sequence_primary].has_key?(index)
cached = node_cache[:labeled_sequence_primary][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
r1 = _nt_label
s0 << r1
if r1
r2 = _nt_sequence_primary
s0 << r2
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(LabeledSequencePrimary0)
r0.extend(LabeledSequencePrimary1)
else
self.index = i0
r0 = nil
end
node_cache[:labeled_sequence_primary][start_index] = r0
return r0
end