How to find a file that render html of a function?

Question

How to find a file in Magento Core that render getPayementHtml() function (Admin Default Template)?

Answer 1

getPaymentHtml() method render from

app/code/core/Mage/Adminhtml/Block/Sales/Order/View/Tab/Info.php

And In Info.php file getPaymentHtml return $this->getChildHtml('order_payment').

order_payment render from

app/code/core/Mage/Adminhtml/Block/Sales/Order/Payment.php

hope this is help to you many thanks.