成员的完整列表，这些成员属于 com.foxit.sdk.addon.pageeditor.ParagraphEditingUndoItem,包括所有继承而来的类成员

delete()	com.foxit.sdk.addon.pageeditor.ParagraphEditingUndoItem
isEmpty()	com.foxit.sdk.addon.pageeditor.ParagraphEditingUndoItem
ParagraphEditingUndoItem(ParagraphEditingUndoItem other)	com.foxit.sdk.addon.pageeditor.ParagraphEditingUndoItem
redo()	com.foxit.sdk.addon.pageeditor.ParagraphEditingUndoItem
undo()	com.foxit.sdk.addon.pageeditor.ParagraphEditingUndoItem