if dir := p.getStrongTypeN0(i); dir != ON {
			return dir
		}
	}
	// no strong types found, return sos
	return p.sos
}

// assignBracketType implements rule N0 for a single bracket pair.
func (p *bracketPairer) assignBracketType(loc bracketPair, dirEmbed Class, initialTypes []Class) {
	// rule "N0, a", inspect contents of pair
	dirPair := p.classifyPairContent(loc, dirEmbed)