I'm working on a sheet with 10 cells running custom functions. Each of the functions are dependent on a single cell being populated with a URL. I'd like the sheet to not display the null values for the 10 cells containing the functions - in other words if a specific cell isn't populated, the cells executing those functions would be blank.

In the past I've done this with a simple if block prior to the unique contents of the cell. An example would be 
=IF(A15="","",
So just to be as specific as possible, lets say A1 contains the URL that is being parsed by these functions. How would I edit the formula below to display nothing if A1 is blank?
=extractATTrue(M14)
Thanks