Looking for use case by for API service using Visual mode in ODA in HCM

Summary:

Actually I am trying to built ODA to fetch the names of project from fusion. I got struct in the how write the expression (in JSON or by using freemaker..as proper syntax and no documentation is available on oracle site. ) for set variable for Rest API

If anyone knows about how to set variable for storing the output of previous state.

Help needed!

Thanks in advance.

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Code Snippet (add any code snippets that support your topic, if applicable):

Pname - Variable name