How to use the adaptive-expressions.ReturnType.Object function in adaptive-expressions

['collection: string|Array'],
      ReturnType.Number,
      'Returns the number of items in the collection'
    ),
  ],
  [
    'contains',
    new FunctionEntity(
      ['collection: stirng|Array|Map', 'value: stirng|Array|Map'],
      ReturnType.Boolean,
      'Works to find an item in a string or to find an item in an array or to find a parameter in a complex object. E.g. contains(‘hello world, ‘hello); contains([‘1’, ‘2’], ‘1’); contains({“foo”:”bar”}, “foo”)'
    ),
  ],
  [
    'first',
    new FunctionEntity(['collection: string|Array'], ReturnType.Object, 'Returns the first item from the collection'),
  ],
  [
    'last',
    new FunctionEntity(['collection: string|Array'], ReturnType.Object, 'Returns the last item from the collection'),
  ],
  [
    'foreach',
    new FunctionEntity(
      ['collection: Array | Object', 'iteratorName: string', 'function: any'],
      ReturnType.Array,
      'Operate on each element and return the new collection'
    ),
  ],
  [
    'addDays',
    new FunctionEntity(

export function getreturnTypeStrFromReturnType(returnType: ReturnType): string {
    let result = '';
    switch(returnType) {
        case ReturnType.Boolean: result = "boolean";break;
        case ReturnType.Number: result = "number";break;
        case ReturnType.Object: result = "any";break;
        case ReturnType.String: result = "string";break;
        case ReturnType.Array: result = "array";break;
    }

    return result;
}

],
  ['string', new FunctionEntity(['value: any'], ReturnType.String, 'Return string version of the specified value')],
  [
    'bool',
    new FunctionEntity(
      ['value: any'],
      ReturnType.Boolean,
      'Return Boolean representation of the specified string. Bool(‘true’), bool(1)'
    ),
  ],
  ['createArray', new FunctionEntity(['...objects: any[]'], ReturnType.Array, 'Create an array from multiple inputs')],
  [
    'if',
    new FunctionEntity(
      ['expression: boolean', 'valueIfTrue: any', 'valueIfFalse: any'],
      ReturnType.Object,
      'if(exp, valueIfTrue, valueIfFalse)'
    ),
  ],
  [
    'rand',
    new FunctionEntity(
      ['minValue: number', 'maxValue: number'],
      ReturnType.Number,
      'Returns a random number between specified min and max value – rand(, )'
    ),
  ],
  [
    'json',
    new FunctionEntity(
      ['value: string|XML'],
      ReturnType.Object,