presto-spi/src/main/java/io/prestosql/spi/HostAddress.java/HostAddress/equals
class HostAddress:    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        final HostAddress other = (HostAddress) obj;
        return Objects.equals(this.host, other.host) &&
                Objects.equals(this.port, other.port);
    }