You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dimension.rb
    path of file: ./repos/reports_kit/lib/reports_kit/reports
    
    the code of the file until where you have to start completion: module ReportsKit
  module Report
    
      def initialize(properties)
        raise ArgumentError.new('Blank properties') if properties.blank?
        properties = { key: properties } if properties.is_a?(String)
        raise ArgumentError.new("Dimension properties must be a String or Hash, not a #{properties.class.name}: #{properties.inspect}") unless properties.is_a?(Hash)
        properties = properties.deep_symbolize_keys
        self.properties = properties
      end