FileIsVisibleFunc - делегат

public delegate bool FileIsVisibleFunc(
	IFileFiltering filtering,
	IFileViewModel viewModel
)

Public Delegate Function FileIsVisibleFunc ( 
	filtering As IFileFiltering,
	viewModel As IFileViewModel
) As Boolean

public delegate bool FileIsVisibleFunc(
	IFileFiltering^ filtering, 
	IFileViewModel^ viewModel
)

type FileIsVisibleFunc = 
    delegate of 
        filtering : IFileFiltering * 
        viewModel : IFileViewModel -> bool