#define IS_BELT_SWITCH(e) HAS_PROPERTY(e, EP_BELT_SWITCH)
#define IS_SP_ELEMENT(e) HAS_PROPERTY(e, EP_SP_ELEMENT)
#define HAS_CONTENT(e) HAS_PROPERTY(e, EP_HAS_CONTENT)
#define IS_BELT_SWITCH(e) HAS_PROPERTY(e, EP_BELT_SWITCH)
#define IS_SP_ELEMENT(e) HAS_PROPERTY(e, EP_SP_ELEMENT)
#define HAS_CONTENT(e) HAS_PROPERTY(e, EP_HAS_CONTENT)