tf.nest package when we dev theese code , flatten and map_structure pack_sequence_as are need eagerly

Please make sure that this is a bug. As per our GitHub Policy, we only address code/doc bugs, performance issues, feature requests and build/installation issues on GitHub. tag:bug_template

System information

• Have I written custom code (as opposed to using a stock example script provided in TensorFlow):
• OS Platform and Distribution (e.g., Linux Ubuntu 16.04 x86_64):
• TensorFlow installed from (source or binary):
• TensorFlow version (use command below):
• Java version (i.e., the output of java -version):
• Java command line flags (e.g., GC parameters):
• Python version (if transferring a model trained in Python):
• Bazel version (if compiling from source):
• GCC/Compiler version (if compiling from source):
• CUDA/cuDNN version:
• GPU model and memory:

Describe the current behavior

Describe the expected behavior

Code to reproduce the issue
Provide a reproducible test case that is the bare minimum necessary to generate the problem.

Other info / logs
Include any logs or source code that would be helpful to diagnose the problem. If including tracebacks, please include the full traceback. Large logs and files should be attached.

Inizia individuando il package tf.nest e le relative implementazioni di flatten, map_structure e pack_sequence_as. L’issue non fornisce alcuna riproduzione, alcun comportamento atteso, percorsi dei file o test, quindi determina innanzitutto cosa significhi “eagerly” per queste API e identifica la copertura esistente prima di definire un controllo di completamento.