# bool Query::Contains(Obj)

[Family: Query](/imperivm/en/CKS/familias/query/)

## Exact signature

```text
bool Query::Contains(Obj)
```

## Description

Passes an Obj value to a resolved Query's membership predicate and returns its boolean result.

## Parameters and return type

**Return type:** `bool`

The member is called on an object. Its receiver is not repeated among this signature’s arguments.

| Position | Type |
| --- | --- |
| 1 | `Obj` |

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