presto-main/src/main/java/io/prestosql/metadata/SignatureBinder.java/SignatureBinder/getLambdaArgumentTypeSignatures
class SignatureBinder:    private static List<TypeSignature> getLambdaArgumentTypeSignatures(TypeSignature lambdaTypeSignature)
    {
        List<TypeSignature> typeParameters = lambdaTypeSignature.getTypeParametersAsTypeSignatures();
        return typeParameters.subList(0, typeParameters.size() - 1);
    }