If a client is asking for a uncommon feature in Appian . But while gathering information in documentation it is not available what to do in this case . where we can find the solution for this
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A few options, vaguely ranked from Fastest to Slowest:
Asking here has worked for me before, but not very often. I would encourage you to find a way to handle the use case with existing functionality (including having a thorough search through the available plug-ins), because otherwise you will probably be waiting for a long time.
Mike's suggestions are good, but one other thing I will mention is that it's important to understand the intent of what a customer is asking for. If you post your use case, there may be other ways to achieve a similar solution (that may still meet the customer's requirements), and understanding why the customer wants this can help us prioritize the right kinds of features.
thank you for the suggestion
thank you for the help