StructuredDocumentTagRangeStart.isShowingPlaceholderText property. Specifies whether the content of this structured document tag shall be interpreted to contain placeholder text (as opposed to regular text contents within the structured document tag)....StructuredDocumentTagRangeStart.isShowingPlaceholderText property. Specifies whether the content of this structured document tag shall be interpreted to contain placeholder text (as opposed to regular text contents within the structured document tag).