Sets the source property of the given node and all of its child nodes.
If source is not a function, then the source object will be copied for all source properties to be set. The
object will be copied using the start and end properties alone, other properties will not be copied.
Sets the
sourceproperty of the given node and all of its child nodes.If
sourceis not a function, then the source object will be copied for allsourceproperties to be set. The object will be copied using thestartandendproperties alone, other properties will not be copied.