read-editor-global-header in Editors

• (read-editor-global-header in) -> boolean
     in : editor-stream-in% object

  Reads data from in to initialize for reading editors from the stream. The return value is #t if the read succeeds, or #f otherwise.

  One or more editors can be read from the stream by calling the editor's read-from-file method. (The number of editors to be read must be known by the application beforehand.) When all editors are read, call read-editor-global-footer. Calls to read-editor-global-header and read-editor-global-footer must bracket any call to read-from-file, and only one stream at a time can be read using these methods or written using write-editor-global-header and write-editor-global-footer.

  When reading from streams that span MrEd versions, use read-editor-version before this procedure.