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It's recommended that the plugin have a version declaration right after the package namespace declaration, e.g.. 'our $VERSION = "1.2.3";'
The '1;' line at the end of the file is required and must not be omitted.
The plugin may load extra Perl modules with 'use', but it must not use any package-level global variables. All its variables and any objects that it might create must have local scope. The plugin must not use Exporter to export anything from its namespace.
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- Line is the complete log entry/line that is being processed and cannot be modified.
- Event is a hash reference and contains the preliminary live data structure of the event as parsed so far.
Event properties can be changed, added and deleted by the plugin function by modifying this live event hash.
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