# File lib/fog/rackspace/models/compute_v2/metadata.rb, line 61
        def []=(key, value)
          return super(key,value) if key.is_a?(Integer)
          return nil unless key
          datum = self.find {|datum| datum.key == key || datum.key == key.to_sym }
          if datum
            datum.value = value
          else
            self << Fog::Compute::RackspaceV2::Metadatum.new(:key => key, :value => value, :service => service, :parent => parent)
          end
          value
        end