`config.rails_semantic_logger.action_message_format` not working?

[waferbaby]

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Hello! Is this option still meant to work? I was hoping to format the ActionController log message with some custom details for our application, but trying to set a proc with the above config just throws an error:

undefined method `action_message_format=' for an instance of RailsSemanticLogger::Options (NoMethodError)

config.rails_semantic_logger.action_message_format = proc do |message, payload|

This is on rails_semantic_logger 4.17.0.