content: [] ' empty array
  [ 1, 2, 3 ] ' array of three members
  [ x+5, true, 1<>2, ["a","b"] ] ' array of four members
  
  [
      "able"
      "baker"
  ]
  
  [
      3.1415,
      2.71828
  ]
  
  [
      { title: "Enabled", EnumValue: "enabled"  },
      { title: "Disabled", EnumValue: "disabled"  },
  ]