mumlHeader = object
  projectName: string
  width: int
  height: int
  frameCount: int            ## プロジェクト全体のフレーム数
  outputPath: string
  fps: float

mumlNode = object
  header: JsonNode
  contents: JsonNode

func contents(muml: mumlNode): JsonNode {....raises: [], tags: [].}

proc contents=(muml: var mumlNode; contents: JsonNode) {....raises: [], tags: [].}

func header(muml: mumlNode): JsonNode {....raises: [], tags: [].}

proc header=(muml: var mumlNode; header: JsonNode) {....raises: [], tags: [].}