A connector includes a female member, and a checking member. Initially, records indicative of network events are received from an input source. Individual plants expressing the male sterility factor are incapable of self-pollination and can be used as female parents in hybrid seed production. The inputs and outputs are then compared to the expected results to determine whether the system under test is performing correctly. An encapsulant material is applied overlaying the LED chips and at least a part of the LPFS. By forming a coating film having a certain thickness or more on an outer surface using a composition containing a resin of specific properties, there can be obtained a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment.