in lib/facebook_ads/ad_objects/server_side/event.rb [182:198]
def list_invalid_properties
invalid_properties = Array.new
if @event_name.nil?
invalid_properties.push('invalid value for "event_name", event_name cannot be nil.')
end
if @event_time.nil?
invalid_properties.push('invalid value for "event_time", event_time cannot be nil.')
end
if @user_data.nil?
invalid_properties.push('invalid value for "user_data", user_data cannot be nil.')
end
invalid_properties
end