def is_undefined(obj):
    from jinja2.runtime import Undefined
    return isinstance(obj, Undefined)
! Check if there is a KV value in buffer
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/jinja2-2.6/jinja2/utils.py/is_undefined--crossover with--dataset/ETHPy150Open ARMmbed/htrun/mbed_host_tests/host_tests_conn_proxy/conn_proxy.py/KiViBufferWalker.search