{only available when compiled with the |+quickfix| feature} This option specifies a function to be used to get the text to display in the quickfix and location list windows. This can be used to customize the information displayed in the quickfix or location window for each entry in the corresponding quickfix or location list. See |quickfix-window-function| for an explanation of how to write the function and an example. The value can be the name of a function or a lambda.