List of formats that the chart will show in context menu, along with label for each one. 
          The attribute value should be a delimiter separated key-value pair.  The delimiter character to be used is '|' (pipe character). The syntax  for the attribute value is as follows: 
            KEY=Value[|KEY=Value]* 
          Example: The code required to enable PNG, JPG and PDF type  of export with custom context-menu message for PNG and PDF. 
          
          exportFormats="PNG=Export as High Quality Image|JPG|PDF=Export as PDF File"  |