code: public CellConstraints rc(int row, int col, String encodedAlignments) {
          return rchw(row, col, 1, 1, encodedAlignments);
      }
docs: Sets row and column origins; sets height and width to 1; decodes vertical and horizontal
  alignments from the given string.<p>
  
  <strong>Examples:</strong><pre>
  cc.rc(3, 1, "bottom, left");
  cc.rc(3, 1, "b, l");
  cc.rc(3, 1, "fill, center");
  cc.rc(3, 1, "f, c");
  </pre>
  
  @param row the new row index
  @param col the new column index
  @param encodedAlignments describes the vertical and horizontal alignments
  @return this
  
  @throws IllegalArgumentException if an alignment orientation is invalid
  
  @since 1.1