classDiagram
  class TypeAdapter {
    +prepare()
    +shell()
    +bind()
    +style()
  }
  class MermaidAdapter {
    +bind()
  }
  class ExcelAdapter {
    +shell()
    +bind()
  }
  TypeAdapter <|-- MermaidAdapter
  TypeAdapter <|-- ExcelAdapter
  WebMD --> TypeAdapter : 注册表