@Test public void nullInput() { assertEquals("wrong result", "", frm.format(null)); }
@Override public String format(Object value) { return value == null ? "" : nonNullFormat(value); }
AbstractCellFormatter implements CellFormatter { @Override public String format(Object value) { return value == null ? "" : nonNullFormat(value); } }
AbstractCellFormatter implements CellFormatter { @Override public String format(Object value) { return value == null ? "" : nonNullFormat(value); }  }
AbstractCellFormatter implements CellFormatter { @Override public String format(Object value) { return value == null ? "" : nonNullFormat(value); }  @Override String format(Object value); }
AbstractCellFormatter implements CellFormatter { @Override public String format(Object value) { return value == null ? "" : nonNullFormat(value); }  @Override String format(Object value);  }