The render method returns a top-level document object. This object contains information about document instance which includes document information (author, description, title, etc) and the component instance, which further includes information about children, props, root instance.
High level picture -
document:
Document {
children: [ [Object] ],
root: [Circular],
props: { children: [Object] },
adder:
MakeDocxP {
docType: 'docx',
genPrivate: [Object],
ogPluginsApi: [Object],
msPluginsApi: [Object],
genobj: [Object],
data: [],
extraSettings: {},
options: [Object],
mainPath: 'word',
mainPathFile: 'document',
relsMain: [Object],
relsApp: [Object],
filesList: [Object],
srcFilesList: [Object] } } }