Methods and properties of class javafx.scene.control.Tooltip should be documented.
Here is the list of undocumented items:
(see here: http://jre.us.oracle.com/java/re/javafx/2.1/promoted/all/b15/docs/api/javafx/scene/control/Tooltip.html)

ObjectProperty<TextAlignment> textAlignment
ContentDisplay getContentDisplay()
Font getFont()
Node getGraphic()
double getGraphicTextGap()
java.lang.String getText()
TextAlignment getTextAlignment()
OverrunStyle getTextOverrun()
boolean isActivated()
boolean isWrapText()
void setContentDisplay(ContentDisplay value)
void setFont(Font value)
void setGraphic(Node value)
void setGraphicTextGap(double value)
void setText(java.lang.String value)
void setTextOverrun(OverrunStyle value)
void setWrapText(boolean value)
ObjectProperty<TextAlignment> textAlignmentProperty()