Delegate CellAreaClassData.GetPreferredHeightForWidthCallback
public delegate void CellAreaClassData.GetPreferredHeightForWidthCallback(nint area, nint context, nint widget, int width, out int minimumHeight, out int naturalHeight)
public delegate void CellAreaClassData.GetPreferredHeightForWidthCallback(nint area, nint context, nint widget, int width, out int minimumHeight, out int naturalHeight)