setStart method
The Range.setStart() method sets the start position of a
Range.
If the startNode is a Node of type Text,
Comment, or CDataSection, then startOffset is
the number of characters from the start of startNode. For other
Node types, startOffset is the number of child nodes between
the start of the startNode.
Setting the start point below (lower in the document) the end point will result in a collapsed range with the start and end points both set to the specified start position.
Implementation
external void setStart(
Node node,
int offset,
);