title: how to find json key value where json array name has space in karate
body: <p>I need to assert an array element in a json where array name has space in it</p>
  
  <p><strong>example json:</strong></p>
  
  <pre><code>{
  "integration": {
      "message": {
          "code": 0,
          "description": "Success"
      },
      "serviceData": {
          "TenantID": "1909627861",
          "Company Name": "anupamaCompany",
          "Sub Domain": "testadd",
          "Usage Data": [{
              "Stage": "Test",
              "Service Type": "OrchestrationIntegration",
              "Integration Name": "Add",
              "Applications List": [],
              "createdBy": "Anupama2",
              "Created Date": "2018-10-03",
              "Last ModifiedBy": "Anupama2",
              "Last Modified Date": "2019-01-10",
              "Integration Type": "Light"
  
          }, {
              "Stage": "Development",
              "Service Type": "OrchestrationIntegration",
              "Integration Name": "Xzxzx",
              "Applications List": [],
              "createdBy": "Anupama2",
              "Created Date": "2019-01-11",
              "Last ModifiedBy": "Anupama2",
              "Last Modified Date": "2019-01-11",
              "Integration Type": "Light"
          }]
      }
  }
  }
  </code></pre>
  
  <p>value to be asserted:</p>
  
  <pre><code>integration.serviceData.["Usage Data"].Stage
  </code></pre>
  
  <p>When I traverse to 'Usage Data' getting an error since it is having space. </p>