ReadonlyblockWhere to insert. Either the main program or the before start
Optional ReadonlychangeWhether to change the selected node after the add. If true or undefined, the selection will be changed to the newly added node, if false the selection will remain unchanged
ReadonlyinsertionWhich position to insert. Either first or last
ReadonlynodeThe node to insert
Describes information required to add a node to the root of a program block