def register_blueprint(self, blueprint):
if blueprint not in self._blueprint_known:<EOL><INDENT>self.app.register_blueprint(blueprint)<EOL>self._blueprint_known.add(blueprint)<EOL><DEDENT>
Register given blueprint on curren app.

This method is provided for using inside plugin's module-level
:func:`register_plugin` functions.

:param blueprint: blueprint object with plugin endpoints
:type blueprint: flask.Blueprint