class_docstr: An ExtensionDtype to hold a single size of floating dtype.
  
  These specific implementations are subclasses of the non-public
  FloatingDtype. For example we have Float32Dtype to represent float32.
  
  The attributes name & type are set when these subclasses are created.
code: def _str_to_dtype_mapping(cls):
      return FLOAT_STR_TO_DTYPE
  
file_path: catboost/contrib/python/pandas/py3/pandas/core/arrays/floating.py
imports: from __future__ import annotations
  import numpy
  from pandas.core.dtypes.base import register_extension_dtype
  from pandas.core.dtypes.common import is_float_dtype
  from pandas.core.arrays.numeric import NumericArray, NumericDtype
label_desc: Use image node_id 2 for calling the FloatingDtype obj's underlying member method code with example usage: obj._str_to_dtype_mapping(cls) and returns: FLOAT_STR_TO_DTYPE