#define _PLUGIN_FEATURE_EAP_PEER(kind, type) __PLUGIN_FEATURE(kind, EAP_PEER, .eap = type)
#define _PLUGIN_FEATURE_DATABASE(kind, type) __PLUGIN_FEATURE(kind, DATABASE, .database = type)
#define _PLUGIN_FEATURE_FETCHER(kind, type) __PLUGIN_FEATURE(kind, FETCHER, .fetcher = type)
+#define _PLUGIN_FEATURE_CUSTOM(kind, name) __PLUGIN_FEATURE(kind, CUSTOM, .custom = name)
#define __PLUGIN_FEATURE_REGISTER(type, _f) (plugin_feature_t){ FEATURE_REGISTER, FEATURE_##type, .arg.reg.f = _f }
#define __PLUGIN_FEATURE_REGISTER_BUILDER(type, _f, _final) (plugin_feature_t){ FEATURE_REGISTER, FEATURE_##type, .arg.reg = {.f = _f, .final = _final, }}