Function validate_trigger_key_bv 

pub fn validate_trigger_key_bv(
    key: &Token,
    cmp: Comparator,
    bv: &BV,
    data: &Everything,
    sc: &mut ScopeContext,
    tooltipped: Tooltipped,
    negated: bool,
    max_sev: Severity,
) -> bool

Validate a trigger given its key and argument. It is like validate_trigger_internal except that all special cases are assumed to have been handled. This is the interface used for the switch effect, where the key and argument are not together in the script.

Returns true iff the trigger had side effects (such as saving scopes).