EShellBackend
@eshellbackend: the object which received the signal.
@arg1:
@shell_backend_a:
@shell_backend_b:
@Returns:
@shell_backend:
@Returns:
@shell_backend:
@Returns:
@shell_backend:
@Returns:
@shell_backend:
@Returns:
@shell_backend:
@activity:
@shell_backend:
@shell_backend:
@Returns:
@shell_backend:
@Returns:
@shell_backend:
@major:
@minor:
@micro:
@error:
@Returns: