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Usage:
  java ${CLASSNAME} <option>
Options:
  --help           this help screen;
  --help conf      help about configuration;
  --help {adapter | parser | filter | logappender} [name]
                   help about adapter, parser or filter configuration;
  --conf filename  the name of configuration file;
  --json content   the content of json configuration.
Example:
  java ${CLASSNAME} --conf billing.yml
  java ${CLASSNAME} --json '{...}'