server

var (
	// ErrInvalidRowData is a printer function error which indicates that the
	// data type given to the printer is unexpected. This error should never be
	// induced by a user error, but may occur if there are changes in modeling.
	ErrInvalidRowData = errors.New("invalid row data")

	// ErrNilData is a printer function error which indicates that the value
	// passed to the printer is nil and can not be printed.
	ErrNilData = errors.New("row handler got nil data")
)