nemo v1.4.0  : AttributeError: type object 'EncDecRNNTModel' has no attribute 'from_pretrained'
**Describe the bug**

AttributeError: type object 'EncDecRNNTModel' has no attribute 'from_pretrained'


code:
import nemo.collections.asr as nemo_asr
conformer_rnnt = nemo_asr.models.EncDecRNNTModel.from_pretrained()

console:
'''
Traceback (most recent call last):
  File "exp1.py", line 19, in <module>
    conformer_rnnt = nemo_asr.models.EncDecRNNTModel.from_pretrained()
AttributeError: type object 'EncDecRNNTModel' has no attribute 'from_pretrained'
'''

**Environment details**
macOS Catalina 10.15.7
python version 3.8.10

**Additional context**

no GPU