How to access object "Context" from Automated task in ARIS Process Engine

Hi,

I'm currently developing an automated task (ARIS Service task) of an automation process governance. In this task I want to use the "Context" object to open an Excel spreadsheet (Context.getExcelReader(Context.getFile())).

When is executed I get the error ""Context" is not defined". How I can get a reference to Context object?

Thanks in advance,

Cristian