custom-rollbar-scope.rb

class MyClass
  attr_reader :a:, :b

  def initialize(a, b)
    @a, @b = a,b
  end

  def process
  rescue => e
    rollbar.error(e)
  end

  def rollbar
    @rollbar ||= Rollbar.scope({custom: { a: a, b: a } })
  end
end