def _load_prefix_binding(self):
pymux = self.pymux<EOL>if self._prefix_binding:<EOL><INDENT>self.custom_key_bindings.remove_binding(self._prefix_binding)<EOL><DEDENT>@self.custom_key_bindings.add(*self._prefix, filter=<EOL>~(HasPrefix(pymux) | has_focus(COMMAND) | has_focus(PROMPT) |<EOL>WaitsForConfirmation(pymux)))<EOL>def enter_prefix_handler(event):<EOL><INDENT>"<STR_LIT>"<EOL>pymux.get_client_state().has_prefix = True<EOL><DEDENT>self._prefix_binding = enter_prefix_handler<EOL>
Load the prefix key binding.