From the Sim-flow Condition Expression Editor,
click Import.
If you are working in collapsed mode, click Functions
and select Import.
The Import Additional Functions dialog box appears.
Click the check box next to the function that you want to import.
You can import more than one group of functions into an expression.
After you select a group of functions, you can view details of the functions
it defines on the right side of the dialog box.
Click OK.
Isight
adds the appropriate #import statement list to the beginning
of the expression. Deleting the #import statement removes
the additional functions.