# File lib/mail/parsers/content_type.rb, line 136 def _nt_main_type start_index = index if node_cache[:main_type].has_key?(index) cached = node_cache[:main_type][index] @index = cached.interval.end if cached return cached end i0 = index r1 = _nt_discrete_type if r1 r0 = r1 else r2 = _nt_composite_type if r2 r0 = r2 else @index = i0 r0 = nil end end node_cache[:main_type][start_index] = r0 r0 end