Power Platform Community Forum Thread Details

Hello all, I am having a hard time getting the values from a list rows present in a table action. This is what my flow looks like

Here is what the values look like from the list rows present in a table action

[
  {
    "@odata.etag": "",
    "ItemInternalId": "2f969558-5d85-4604-b879-948f4f069b0a",
    "Heading1": "Heading 1",
    "Heading2": "Heading 2",
    "Heading3": "Heading 3"
  },
  {
    "@odata.etag": "",
    "ItemInternalId": "c671e1f3-ee92-47a7-98a6-a6f0b5c88ef2",
    "Heading1": "This",
    "Heading2": "Is",
    "Heading3": "A test"
  }
]



This gets the columns and values from each file in a sharepoint folder. Now, I just want a compose that shows me all the column names 
because I am going to use the column names in a check to see if something exist. The column names can be different so I can hard code anything
It needs to basically loop through and get the column names from the file. Any ideas? I tried join(keys(items('Apply_to_each_2')), ', ') based on research, and then tried it without the join as well and I get the same error
Unable to process template language expressions in action 'Compose' inputs at line '0' and column '0': 'The template function 'keys' is not defined or not valid.'.
 
 