• Utkarsh Ayachit's avatar
    fixes #220: pass only requested fields. · cb7cbdbc
    Utkarsh Ayachit authored
    Adding API to DataSet to `CopyStructure` from another dataset. This
    copies the cellsets and coordinate systems while leaving the fields
    unchanged.
    
    CreateResult no longer copies all input fields to the output dataset
    created.
    
    Furthermore, if a Filter subclass doesn't provide `MapFieldOntoOutput`,
    then the default implementation simply copies only the selected fields
    to the output dataset.
    cb7cbdbc