GObject
    ╰── VipsObject
        ├── VipsConnection
        │   ├── VipsSource
        │   │   ╰── VipsSourceCustom
        │   ╰── VipsTarget
        │       ╰── VipsTargetCustom
        ├── VipsOperation
        │   ╰── VipsForeign
        │       ├── VipsForeignLoad
        │       ╰── VipsForeignSave
        ├── VipsImage
        ├── VipsInterpolate
        ├── VipsRegion
        ├── VipsSbuf
        ╰── VipsThreadState
    GBoxed
    ├── VipsArea
    ├── VipsArrayDouble
    ├── VipsArrayInt
    ├── VipsArrayImage
    ├── VipsBlob
    ├── VipsRefString
    ╰── VipsThing