Know if a generator is being destroyed?

Basically I have a generator like this:

class ConceptGenerator < Rails::Generators::NamedBase
  argument :attributes, type: :array, default: [], banner: "field[:type][:index] field[:type][:index]"

  def generate_model
    rails_command("generate model #{class_name} #{attributes.join(" ")}")
  end

But when I do rails destroy concept SlackAccount user:references if doesn’t do destroy model