presto-main/src/main/java/io/prestosql/server/PluginClassLoader.java/PluginClassLoader/getResource
class PluginClassLoader:    @Override
    public URL getResource(String name)
    {
        // If this is an SPI resource, only check SPI class loader
        if (isSpiResource(name)) {
            return spiClassLoader.getResource(name);
        }

        // Look for resource locally
        return super.getResource(name);
    }