Represents constraints in AST pattern matching.
| Modifiers | Name | Description | 
|---|---|---|
static ConstraintPredicate<Token>  | 
                            ANY_TOKEN | 
                            
| Type | Name and description | 
|---|---|
ConstraintPredicate<TreeContext>  | 
                            eventually | 
                        
Set<String>  | 
                            placeholders | 
                        
ConstraintPredicate<Token>  | 
                            tokenPredicate |