anchor.diff:        },
   
         _updateSolution() {
  +        console.debug("Updating solution");
           const blockly = this._getBlockly();
   
           if (this.teacherMode) {
  
positive.code:       },
  
        _setGameActions() {
          const blockly = this._getBlockly();
          if (this._isGame()) {
            blockly.primitiveProcedures = blockly.primitiveProcedures || [];
  
negative.code:           return;
          }
  
          console.debug("Set teacher actions");
          const blockly = this._getBlockly();
          const actions = new Parser().getActionsFromSource(teacherCode);
          blockly.primitiveProcedures = this._withDefaultIcons(actions, 'procedureDeclarations');
  