public ErConnectEssencePair(ErEssence essence, ErRelationshipConnectType relationshipConnectType)
 {
     Essence = essence;
     RelationshipConnectType = relationshipConnectType;
 }
 public ErConnectEssencePair()
 {
     Essence = new ErEssence();
     RelationshipConnectType = new ErRelationshipConnectType();
 }