He challenged the California court's out-of-state subpoena, which he believed was compelling him to travel against his will.
if let Some(rest) = head.strip_prefix("ref: ").map(str::trim) {
。新收录的资料对此有专业解读
You can do something similar with the leading bytes. If they start with，这一点在新收录的资料中也有详细论述
'relname', 'orders',，更多细节参见新收录的资料