package cz.hobrasoft.pdfmu.operation;

import cz.hobrasoft.pdfmu.JSONWriterEx;

public abstract class OperationCommon implements Operation {

    private JSONWriterEx json;

    @Override
    public void setJsonWriter(JSONWriterEx json) {
        this.json = json;
    }
}

@@ -145,13 +145,15 @@
   pr
-ivate
+otected
  JSO

Make field `json` protected (was private)