presto-spi/src/main/java/io/prestosql/spi/type/NamedTypeSignature.java/NamedTypeSignature/equals
class NamedTypeSignature:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        NamedTypeSignature other = (NamedTypeSignature) o;

        return Objects.equals(this.fieldName, other.fieldName) &&
                Objects.equals(this.typeSignature, other.typeSignature);
    }