code: public CellConstraints xy(int col, int row, String encodedAlignments) {
          return xywh(col, row, 1, 1, encodedAlignments);
      }
docs: Sets column and row origins; sets width and height to 1; decodes horizontal and vertical
  alignments from the given string.<p>
  
  <strong>Examples:</strong><pre>
  cc.xy(1, 3, "left, bottom");
  cc.xy(1, 3, "l, b");
  cc.xy(1, 3, "center, fill");
  cc.xy(1, 3, "c, f");
  </pre>
  
  @param col the new column index
  @param row the new row index
  @param encodedAlignments describes the horizontal and vertical alignments
  @return this
  
  @throws IllegalArgumentException if an alignment orientation is invalid