SIMPLE_DATE
SIMPLE_DATE = "Y-m-d\\TH:i:sP"
Serializes a log message to GELF
$dateFormat : string
$maxNormalizeDepth : int
$maxNormalizeItemCount : int
$systemName : string
$extraPrefix : string
$contextPrefix : string
$maxLength : int
$jsonEncodeOptions : int
$gelfVersion : int
$logLevels : array<int,int>
Translates Monolog log levels to Graylog2 log priorities.