Revize 66c042f1

Re #8775 - Agregovat grafy se stejným typem sensoru

• bugs fixed
• sensors and units sending request to new methods
• ready for observation data

src/app/shared/graph-loading/emptygraph.ts

@@ -24 +24 @@
     return rvalue;
   }
 
+  setData(spec, data) {
+    //DO NOTHING
+  }
+
+  setLegendInfo(spec, legend) {
+    //DO NOTHING
+  }
+
 }