A valid scenario is this, in On Edit-Validate, the input is the form before it's persisted to database.

Let's say I have form called Company, input is of form Company.

I have a custom function that uses fields inside Company to send emails. 

void mySendMail(Company c) {...}

I want to be able to call the function in the following two ways:

1)

mySendMail(input);

2)

x = Company[ID== 2341252];

mySendMail(x);

Now, because i can't pass input as an argument, i can't write this reusable function. Any suggestion?