class RuboCop::Cop::Rails::ReflectionClassName

def str_assigned?(reflection_class_name)
  lvar = reflection_class_name.value.source
  reflection_class_name.ancestors.each do |nodes|
    return true if nodes.each_child_node(:lvasgn).detect do |node|
      lhs, rhs = *node
      lhs.to_s == lvar && ALLOWED_REFLECTION_CLASS_TYPES.include?(rhs.type)
    end
  end
  false
end