Make HologramPosition.add() return the position itself

api/src/main/java/me/filoghost/holographicdisplays/api/hologram/HologramPosition.java

@@ -45,7 +45,7 @@ public interface HologramPosition {
 
     void setZ(double z);
 
-    void add(double x, double y, double z);
+    HologramPosition add(double x, double y, double z);
 
     int getBlockX();
 

plugin/src/main/java/me/filoghost/holographicdisplays/plugin/hologram/api/APIHologramPosition.java

@@ -19,4 +19,10 @@ public class APIHologramPosition extends BaseHologramPosition implements Hologra
         super(location);
     }
 
+    @Override
+    public APIHologramPosition add(double x, double y, double z) {
+        super.add(x, y, z);
+        return this;
+    }
+
 }

plugin/src/main/java/me/filoghost/holographicdisplays/plugin/hologram/base/BaseHologramPosition.java

@@ -96,10 +96,11 @@ public class BaseHologramPosition {
         this.z = z;
     }
 
-    public void add(double x, double y, double z) {
+    public BaseHologramPosition add(double x, double y, double z) {
         this.x += x;
         this.y += y;
         this.z += z;
+        return this;
     }
 
     public void set(String worldName, double x, double y, double z) {