bind_locals

# File actionview/lib/action_view/unbound_template.rb, line 20
    def bind_locals(locals)
      if template = @templates[locals]
        template
      else
        @write_lock.synchronize do
          normalized_locals = normalize_locals(locals)

          # We need ||=, both to dedup on the normalized locals and to check
          # while holding the lock.
          @templates[normalized_locals] ||= build_template(normalized_locals)

          # This may have already been assigned, but we've already de-dup'd so
          # reassignment is fine.
          @templates[locals.dup] = @templates[normalized_locals]
        end
      end
    end