| targetGroup | The name of the group of devices. | 
| defines | Symbols for this group separated by semicolons. | 
Set user-specified symbols for script compilation for the given build target group.
The second argument, defines, is a string of preprocessor values.  The values that this string
contains is located in "Scripting Define Symbols".  This can be located in the Configuration
section of the PlayerSettings.
See Also: Platform Dependent Compilation.