anchor.diff:                Container(
                   child: _loading
                       ? Container(
  -                  height: 400,
  -                  child: new Center(
  -                    child: new SizedBox(
  -                      height: 50.0,
  -                      width: 50.0,
  -                      child: new CircularProgressIndicator(
  -                        value: null,
  -                        strokeWidth: 7.0,
  -                      ),
  -                    ),
  -                  ),
  -                )
  +                        height: 400,
  +                        child: new Center(
  +                          child: new SizedBox(
  +                            height: 50.0,
  +                            width: 50.0,
  +                            child: new CircularProgressIndicator(
  +                              value: null,
  +                              strokeWidth: 7.0,
  +                            ),
  +                          ),
  +                        ),
  +                      )
                       : Chart(
  -                  data: data,
  -                ),
  +                        data: data,
  +                      ),
                 ),
                 SizedBox(
                   height: MediaQuery.of(context).size.height * 0.24,
  
positive.code:                                 ? "Name of Region Selected"
                                  : "Press Select")),
                          validator: (value) {
                            if (dropDownValue == null){
                              return "Please select a category from drop down list";
                            }
                            if (value.isEmpty && dropDownValue != "ALL") {
  
negative.code:           ),
          ),
          minHeight: MediaQuery.of(context).size.height * 0.06,
          maxHeight: MediaQuery.of(context).size.height * 0.4,
          // Body includes the widgets that show on screen when slide panel is collapsed.
          // In includes a bar chart for showing number of merchants in different categories of verification - successful, failed, revisiting required and unvisited.
          body: Center(
  