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%&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz                                                                         
 








      
 	

     
  
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$4 % &'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz                                                                        
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class Logger
  # Logging severity.
  module Severity
    # Low-level information, mostly for developers.
    DEBUG = 0
    # Generic (useful) information about system operation.
    INFO = 1
    # A warning.
    WARN = 2
    # A handleable error condition.
    ERROR = 3
    # An unhandleable error that results in a program crash.
    FATAL = 4
    # An unknown message that should always be logged.
    UNKNOWN = 5
  end
end