docs: public static @CheckForNull
      XMethod findMethod(ClassDescriptor classDesc, String methodName, String methodSig, boolean isStatic) {
          if (DEBUG_METHOD_LOOKUP) {
              System.out.println("Check " + classDesc.getClassName());
          }
  
          try {
              XClass xClass = Global.getAnalysisCache().getClassAnalysis(XClass.class, classDesc);
              return xClass.findMethod(methodName, methodSig, isStatic);
          } catch (CheckedAnalysisException e) {
              AnalysisContext.logError("Error looking for " + classDesc + "." + methodName + methodSig, e);
              return null;
          }
  
      }