@property<EOL><INDENT>def _dep_map(self):<DEDENT>
try:<EOL><INDENT>return self.__dep_map<EOL><DEDENT>except AttributeError:<EOL><INDENT>self.__dep_map = self._filter_extras(self._build_dep_map())<EOL><DEDENT>return self.__dep_map<EOL>
A map of extra to its list of (direct) requirements
for this distribution, including the null extra.