code: public static boolean isMethodCallOnObject(Expression expression, String methodObjectPattern) {
          if (expression instanceof MethodCallExpression) {
              Expression objectExpression = ((MethodCallExpression) expression).getObjectExpression();
              if (objectExpression instanceof VariableExpression) {
                  String name = ((VariableExpression) objectExpression).getName();
                  if (name != null && name.matches(methodObjectPattern)) {
                      return true;
                  }
              }
              if (objectExpression instanceof PropertyExpression && objectExpression.getText() != null && objectExpression.getText().matches(methodObjectPattern)) {
                  return true;
              }
              if (objectExpression instanceof MethodCallExpression && isMethodNamed((MethodCallExpression) objectExpression, methodObjectPattern)) {
                  return true;
              }
          }
          return false;
      }
docs: Tells you if the expression is a method call on a particular object (which is represented as a String).
  For instance, you may ask isMethodCallOnObject(e, 'this') to find a this reference.
  @param expression - the expression
  @param methodObjectPattern - the name of the method object (receiver) such as 'this'
  @return
  as described