invalid components: schema "ChartRestApi.post": invalid example: value must be a string
Schema:
  {
    "description": "The type of chart visualization used.",
    "example": [
      "bar",
      "line_multi",
      "area",
      "table"
    ],
    "maxLength": 250,
    "type": "string"
  }

Value:
  [
    "bar",
    "line_multi",
    "area",
    "table"
  ]
