• The requirement was to hide create a button on the business process flow on a certain condition and Microsoft document gives a function to use getNavigationBehavior()

Refer : https://docs.microsoft.com/en-us/powerapps/developer/model-driven-apps/clientapi/reference/formcontext-data-process/stage/getnavigationbehavior

• but was getting Error : formContext.data.process.getActiveStage.getNavigationBehavior is not a function
• After some debugging found the Document page code need some amendment

• If this type of issue is identified on page , we have an option to submit feedback and raise It in https://github.com/MicrosoftDocs

For example, here is the Create button in the Develop stage of the AccountToContactProcess sample business process flow that lets you create a Contact record from the Account form.

Below snippet is from Microsoft doc which needs some correction:
https://docs.microsoft.com/en-us/powerapps/developer/model-driven-apps/clientapi/reference/formcontext-data-process/stage/getnavigationbehavior

function sampleFunction(executionContext) {
    var formContext = executionContext.getFormContext();
    formContext.data.process.getActiveStage().getNavigationBehavior().allowCreateNew = function () {
        if (formContext.data.process.getName() === 'Test Process') {
            return false; // Create button is not available
        }
        else {
            return true; // Create button is available
        }
    }
}