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## Severity level constants
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byte DEBUG=1 #debug level
byte INFO=2  #general level
byte WARN=4  #warning level
byte ERROR=8 #error level
byte FATAL=16 #fatal/critical level
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## Fields
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Header header
byte level
string name # name of the node
string msg # message 
string file # file the message came from
string function # function the message came from
uint32 line # line the message came from
string[] topics # topic names that the node publishes
