Function locationFromPageNumber not defined in Document

[rami-alloush]

I've followed all the steps to build the library, and I get the following errors that seems to be related to a missing function definition or something.
Not sure if I'm missing something on my side.
Thanks

> Task :lib:compileReleaseJavaWithJavac FAILED
/home/rami/mupdf-android-viewer/lib/src/main/java/com/artifex/mupdf/viewer/MuPDFCore.java:72: error: cannot find symbol
                        long mark = doc.makeBookmark(doc.locationFromPageNumber(oldPage));
                                                        ^
  symbol:   method locationFromPageNumber(int)
  location: variable doc of type Document
/home/rami/mupdf-android-viewer/lib/src/main/java/com/artifex/mupdf/viewer/MuPDFCore.java:82: error: cannot find symbol
                        return doc.pageNumberFromLocation(doc.findBookmark(mark));
                                  ^
  symbol:   method pageNumberFromLocation(int)
  location: variable doc of type Document
/home/rami/mupdf-android-viewer/lib/src/main/java/com/artifex/mupdf/viewer/MuPDFCore.java:162: error: cannot find symbol
                return doc.pageNumberFromLocation(doc.resolveLink(link));
                                                     ^
  symbol:   method resolveLink(Link)
  location: variable doc of type Document
/home/rami/mupdf-android-viewer/lib/src/main/java/com/artifex/mupdf/viewer/MuPDFCore.java:184: error: cannot find symbol
                                int page = doc.pageNumberFromLocation(doc.resolveLink(node));
                                                                         ^
  symbol:   method resolveLink(Outline)
  location: variable doc of type Document
/home/rami/mupdf-android-viewer/lib/src/main/java/com/artifex/mupdf/viewer/PageView.java:493: error: cannot find symbol
                if (link.isExternal()) {
                        ^
  symbol:   method isExternal()
  location: variable link of type Link
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
5 errors

FAILURE: Build failed with an exception.

[ccxvii]

Have you checked out and made sure all the submodules are at the correct version?

If you are using the Maven repositories for the submodules, you must use a tagged version of the main repository since the current master may use changes in submodules that haven't been released yet.