presto-main/src/main/java/io/prestosql/metadata/SignatureBuilder.java/SignatureBuilder/typeVariableConstraints
class SignatureBuilder:    public SignatureBuilder typeVariableConstraints(List<TypeVariableConstraint> typeVariableConstraints)
    {
        this.typeVariableConstraints = ImmutableList.copyOf(requireNonNull(typeVariableConstraints, "typeVariableConstraints is null"));
        return this;
    }