Delegate CellAreaClassData.GetPreferredWidthForHeightCallback
public delegate void CellAreaClassData.GetPreferredWidthForHeightCallback(nint area, nint context, nint widget, int height, out int minimumWidth, out int naturalWidth)
public delegate void CellAreaClassData.GetPreferredWidthForHeightCallback(nint area, nint context, nint widget, int height, out int minimumWidth, out int naturalWidth)