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# withSubstitutionVariables(_:)

Returns a copy of the predicate and substitutes the predicates variables with specified values from a specified substitution variables dictionary.

```
func withSubstitutionVariables(_ variables: [String : Any]) -> Self
```

## Parameters

`variables`

The substitution variables dictionary. The dictionary must contain key-value pairs for all variables in the receiver.

## Return Value

A copy of the receiver with the predicate’s variables substituted by values specified in `variables`.

## Discussion

The predicate itself is not modified by this method, so you can reuse it for any number of substitutions.

---

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