android/guava/src/com/google/common/base/Throwables.java
@GwtIncompatible // java.lang.reflect
  @NullableDecl
  private static Method getSizeMethod() {
    try {
      Method getStackTraceDepth = getJlaMethod("getStackTraceDepth", Throwable.class);
      if (getStackTraceDepth == null) {
        return null;
      }
      getStackTraceDepth.invoke(getJLA(), new Throwable());
      return getStackTraceDepth;
    } catch (UnsupportedOperationException | IllegalAccessException | InvocationTargetException e) {
      return null;
    }
  }
@GwtIncompatible // java.lang.reflect
  @NullableDecl
  private static Method getSizeMethod() {
    try {
      Method getStackTraceDepth = getJlaMethod("getStackTraceDepth", Throwable.class);
      if (getStackTraceDepth == null) {
        return null;
      }
      getStackTraceDepth.invoke(getJLA(), new Throwable());
      return getStackTraceDepth;
    } catch (UnsupportedOperationException | IllegalAccessException | InvocationTargetException e) {
      return null;
    }
  }
@ GwtIncompatible // java.lang.reflect @ NullableDecl private static Method getSizeMethod ( ) { try { Method getStackTraceDepth = getJlaMethod ( "getStackTraceDepth" , Throwable . class ) ; if ( getStackTraceDepth == null ) { return null ; } getStackTraceDepth . invoke ( getJLA ( ) , new Throwable ( ) ) ; return getStackTraceDepth ; } catch ( UnsupportedOperationException | IllegalAccessException | InvocationTargetException e ) { return null ; } }
Returns the Method that can be used to return the size of a stack, or null if that method
cannot be found (it is only to be found in fairly recent JDKs). Tries to test method {@link
sun.misc.JavaLangAccess#getStackTraceDepth(Throwable)} getStackTraceDepth} prior to return it
(might fail some JDKs).

<p>See <a href="https://github.com/google/guava/issues/2887">Throwables#lazyStackTrace throws
UnsupportedOperationException</a>.
Returns the Method that can be used to return the size of a stack or null if that method cannot be found ( it is only to be found in fairly recent JDKs ) . Tries to test method { @link sun . misc . JavaLangAccess#getStackTraceDepth ( Throwable ) } getStackTraceDepth } prior to return it ( might fail some JDKs ) .