# File lib/tree.rb, line 749
    def summarize_subnets!(cidr)
        merged = false

        # validate object
        if ( !cidr.kind_of?(NetAddr::CIDR) )
            begin
                cidr = NetAddr::CIDR.create(cidr)
            rescue Exception => error
                raise ArgumentError, "Provided argument raised the following " +
                                     "errors: #{error}"
            end
        end

        me = find_me(cidr)

        if (me)
            merged = NetAddr.cidr_summarize(me.tag[:Subnets])
            me.tag[:Subnets] = merged
            merged = true
        end

        return(merged)
    end