| Interface | Description | 
|---|---|
| Function | 
 Represents a function shown in the Expression Editor. | 
| FunctionModel | 
 This interface provides methods to add and remove script functions in the Expression Editor accessible from Assignment
 and If program nodes among others. | 
| Exception | Description | 
|---|---|
| FunctionException | This exception is thrown if a function has an illegal name, illegal parameter or too many parameters. | 
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