get_row_from_values
Description:
[ CCode ( vfunc_name = "i_find_row" ) ]
public abstract int get_row_from_values (SList<Value?> values, int[] cols_index)
  public abstract int get_row_from_values (SList<Value?> values, int[] cols_index)
Returns the first row where all the values in values at the columns identified at cols_index match.
If the row can't be identified, then returns -1;
NOTE: the cols_index array MUST contain a column index for each value in values
Parameters:
| this | a DataModel object. | 
| values | a list of Value values (no  | 
| cols_index | an array of int containing the column number to match each value of  | 
Returns:
| the requested row number, of -1 if not found |