def add(self, elem, replace=False):
        """Add a requirement.

        :param elem: a string or :class:`Requirement` instance.
        :param replace: if `True`, packages in the set with the same name will
            be removed first.
        """
        if isinstance(elem, text_type):
            elem = Requirement.coerce(elem)
        if replace and elem in self:
            self.remove(elem)
        super(Requirements, self).add(elem)
def draw(self, context):
        from rna_keymap_ui import draw_keymaps

        layout = self.layout

        #import time

        #start = time.time()

        userpref = context.user_preferences

        inputs = userpref.inputs

        split = layout.split(percentage=0.25)

        # Input settings
        self.draw_input_prefs(inputs, split)

        # Keymap Settings
        draw_keymaps(context, split)

        #print("runtime", time.time() - start)