The RDoc::TopLevel corresponding to this
require, or nil if not found.
# File lib/rdoc/require.rb, line 39
def top_level
@top_level ||= begin
tl = RDoc::TopLevel.all_files_hash[name + '.rb']
if tl.nil? and RDoc::TopLevel.all_files.first.full_name =~ %(^lib/) then
# second chance
tl = RDoc::TopLevel.all_files_hash['lib/' + name + '.rb']
end
tl
end
end