presto-main/src/main/java/io/prestosql/server/PluginDiscovery.java/PluginDiscovery/readClass
class PluginDiscovery:    private static ClassReader readClass(String name, ClassLoader classLoader)
    {
        try (InputStream in = classLoader.getResourceAsStream(binaryName(name) + CLASS_FILE_SUFFIX)) {
            if (in == null) {
                throw new RuntimeException("Failed to read class: " + name);
            }
            return new ClassReader(toByteArray(in));
        }
        catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }