def each_pair(type, default = nil)
			real_hash.each_key() { |key|
				value = fetch(key, type, default)
				if (!value.nil?)
					yield(key, value)
				end
			}
		end
def each_pair(type, default = nil)
			real_hash.each_key() { |key|
				value = fetch(key, type, default)
				if (!value.nil?)
					yield(key, value)
				end
			}
		end
Enumerates the key, value pairs in the has.