getParentLinkCategoryForNodeData method
Find the category for the parent link of a given child node data, a string naming the link template that the Diagram should use to represent the link. @param {Object} childdata a JavaScript object represented by a node data. @return {string} @see #parentLinkCategoryProperty @see #setParentLinkCategoryForNodeData
Implementation
_i2.String getParentLinkCategoryForNodeData(_i2.Object childdata) =>
    _i4.callMethod(
      this,
      'getParentLinkCategoryForNodeData',
      [childdata],
    );