Gets the document-level ECMAScript actions of the JavaScript tree, in key order. Never run. A value that is not an
ECMAScript action is skipped with a diagnostic.
public IReadOnlyList<KeyValuePair<CosString, PdfJavaScriptAction>> JavaScriptActions { get; }
ISO 32000-2 §7.7.4, Table 32, and §12.6.4.17. A fresh walk of the tree on every call.