code: public boolean addDataStyle(final DataStyle dataStyle) {
          if (dataStyle.isHidden()) {
              return this.dataStylesContainer
                      .add(dataStyle.getName(), Dest.CONTENT_AUTOMATIC_STYLES, dataStyle);
          } else {
              return this.dataStylesContainer
                      .add(dataStyle.getName(), Dest.STYLES_COMMON_STYLES, dataStyle);
          }
      }
docs: Create a new data style into styles container. No duplicate style name is allowed.
  Must be used if the table-cell style already exists.
  
  @param dataStyle the data style to add
  @return true if the style was added