Function interp_deque_push_back 

fn interp_deque_push_back(
    args: &[RValue],
    named: &[(String, RValue)],
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>

Append a value to the back of a deque.

@param d integer scalar: deque ID @param value any R value to append @return NULL (invisibly)