add method
Adds a Part to the Layer that matches the Part's Part#layerName, or else the default layer, which is named with the empty string.
Normally parts added to a diagram are top-level parts. If you want nodes to be members of a Group, in addition to calling this method call Group#addMembers or set each Part#containingGroup. @param {Part} part @see #remove
Implementation
void add(_i3.Part part) {
_i4.callMethod(
this,
'add',
[part],
);
}