code: function _changeIndentWidth(fullPath, value) {
          $indentWidthLabel.removeClass("hidden");
          $indentWidthInput.addClass("hidden");
  
          // remove all event handlers from the input field
          $indentWidthInput.off("blur keyup");
  
          // restore focus to the editor
          MainViewManager.focusActivePane();
  
          var valInt = parseInt(value, 10);
          if (Editor.getUseTabChar(fullPath)) {
              if (!Editor.setTabSize(valInt, fullPath)) {
                  return;     // validation failed
              }
          } else {
              if (!Editor.setSpaceUnits(valInt, fullPath)) {
                  return;     // validation failed
              }
          }
  
          // update indicator
          _updateIndentSize(fullPath);
  
          // column position may change when tab size changes
          _updateCursorInfo();
      }
docs: Change indent size
  @param {string} fullPath Path to file in current editor
  @param {string} value Size entered into status bar