DagSlice (OpenRefine 4.0-SNAPSHOT API)

All Known Implementing Classes:

AdditionSlice, OpaqueSlice, ReorderSlice, TransformationSlice
```
public interface DagSlice
```
A slice in the directed acyclic graph of column dependencies, corresponding to the application of a single operation.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ColumnModel`	`applyToColumns(ColumnModel columns)`	Given the list of columns before the change, return the list of columns after the slice.

- Method Detail
  - applyToColumns
```
ColumnModel applyToColumns(ColumnModel columns)
                    throws IncompatibleSliceException
```
    Given the list of columns before the change, return the list of columns after the slice.
    
    Parameters:
    
    columns - the column metadata before the change, in project order
    
    Returns:
    
    the column metadata after the change
    
    Throws:
    
    IncompatibleSliceException