---
title: jsonRepresentation()
framework: metrickit
role: symbol
role_heading: Instance Method
path: metrickit/mxcallstacktree/jsonrepresentation()
---

# jsonRepresentation()

Returns the contents of the stack tree in JSON format.

## Declaration

```swift
func jsonRepresentation() -> Data
```

## Return Value

Return Value A Data object containing the JSON representation of the stack tree.

## Discussion

Discussion The stack tree is returned as a JSON dictionary. The top level contains one key: The callStackTree dictionary contains two keys: A call stack is a dictionary containing at most two keys: A stack frame is a dictionary containing up to six keys: The following code shows a partial example of the JSON for a stack tree with one stack frame per thread: {  "callStackTree" : {   "callStackPerThread" : true,   "callStacks" : [     {       "threadAttributed" : false,       "callStackRootFrames" : [         {           "binaryUUID" : "70B89F27-1634-3580-A695-57CDB41D7743",           "offsetIntoBinaryTextSegment" : 165304,           "sampleCount" : 1,           "binaryName" : "MetricKitTestApp",           "address" : 7170766264           "subFrames" : [             {               "binaryUUID" : "77A62F2E-8212-30F3-84C1-E8497440ACF8",               "offsetIntoBinaryTextSegment" : 6948,               "sampleCount" : 1,               "binaryName" : "libdyld.dylib",               "address" : 7170808612              }           ]          }       ]     },     {       "threadAttributed" : true,       "callStackRootFrames" : [  ...