code: void adjustLeft(float newValue) {
      	Object[] o = (Object[])attributes.get(Chunk.TAB);
      	if (o != null) {
      		attributes.put(Chunk.TAB, new Object[]{o[0], o[1], o[2], new Float(newValue)});
      	}
      }
docs: Correction for the tab position based on the left starting position.
  @param	newValue	the new value for the left X.
  @since	2.1.2