Function validate_effect_field 

pub fn validate_effect_field(
    caller: &Lowercase<'_>,
    key: &Token,
    cmp: Comparator,
    bv: &BV,
    data: &Everything,
    sc: &mut ScopeContext,
    tooltipped: Tooltipped,
    special_tokens: &mut SpecialTokens,
) -> bool

Validate a single effect field