getToKeyForLinkData method
From a link data retrieve a value uniquely identifying the node data to which this link is connected. @param {ObjectData} linkdata a JavaScript object represented by a link. @return {string|number|undefined} This may return undefined if the link is not going to any node. @see #linkToKeyProperty @see #setToKeyForLinkData
Implementation
_i2.dynamic getToKeyForLinkData(_i2.Object linkdata) => _i4.callMethod(
this,
'getToKeyForLinkData',
[linkdata],
);