code: public DateTimeFormatterBuilder appendText(TemporalField field, TextStyle textStyle) {
          Jdk8Methods.requireNonNull(field, "field");
          Jdk8Methods.requireNonNull(textStyle, "textStyle");
          appendInternal(new TextPrinterParser(field, textStyle, DateTimeTextProvider.getInstance()));
          return this;
      }
docs: Appends the text of a date-time field to the formatter.
  <p>
  The text of the field will be output during a print.
  The value must be within the valid range of the field.
  If the value cannot be obtained then an exception will be thrown.
  If the field has no textual representation, then the numeric value will be used.
  <p>
  The value will be printed as per the normal print of an integer value.
  Only negative numbers will be signed. No padding will be added.
  
  @param field  the field to append, not null
  @param textStyle  the text style to use, not null
  @return this, for chaining, not null