func github.com/prometheus/common/expfmt.isValidLabelNameStart

4 uses

	github.com/prometheus/common/expfmt (current package)
		text_parse.go#L614: 	if !isValidLabelNameStart(p.currentByte) {
		text_parse.go#L703: func isValidLabelNameStart(b byte) bool {
		text_parse.go#L708: 	return isValidLabelNameStart(b) || (b >= '0' && b <= '9')
		text_parse.go#L712: 	return isValidLabelNameStart(b) || b == ':'