- TIBCO BusinessEvents®
- Standard
- Instance
- PropertyArray

# Instance.PropertyArray.indexOfConceptReference()

## Signature

`int indexOfConceptReference(PropertyArrayConceptReference arr, Concept instance)`

## Domain

ACTION, CONDITION, QUERY, BUI

## Description

Returns the index in the PropertyArrayConceptReference of the first occurrence of the specified Concept instance, or -1 if the PropertyArrayConceptReference does not contain this Concept instance.

## Parameters

Name | Type | Description
--- | --- | ---
`arr` | `PropertyArrayConceptReference` | The `PropertyArrayConceptReference` for searching.
`instance` | `Concept` | The specified `Concept instance` to search for.

## Returns

Type | Description
--- | ---
`int` | The index of `value` in the given PropertyArrayConceptReference.

## Cautions

none