class_docstr: Hook for Google Cloud Spanner APIs.
  
  All the methods in the hook where project_id is used must be called with
  keyword arguments rather than positional.
class_docstr_tok: ["Hook","for","Google","Cloud","Spanner","APIs",".","All","the","methods","in","the","hook","where","project_id","is","used","must","be","called","with","keyword","arguments","rather","than","positional","."]
docstr: Gets information about a particular instance.
  
  :param project_id: Optional, The ID of the Google Cloud project that owns the Cloud Spanner
      database. If set to None or missing, the default project_id from the Google Cloud connection
      is used.
  :param instance_id: The ID of the Cloud Spanner instance.
  :return: Spanner instance
docstr_tok: ["Gets","information","about","a","particular","instance",".",":","param","project_id",":","Optional",",","The","ID","of","the","Google","Cloud","project","that","owns","the","Cloud","Spanner","database",".","If","set","to","None","or","missing",",","the","default","project_id","from","the","Google","Cloud","connection","is","used",".",":","param","instance_id",":","The","ID","of","the","Cloud","Spanner","instance",".",":","return",":","Spanner","instance"]
code: def get_instance(
      self,
      instance_id: str,
      project_id: str,
  ) -> Instance | None:
      """
      Gets information about a particular instance.
  
      :param project_id: Optional, The ID of the Google Cloud project that owns the Cloud Spanner
          database. If set to None or missing, the default project_id from the Google Cloud connection
          is used.
      :param instance_id: The ID of the Cloud Spanner instance.
      :return: Spanner instance
      """
      instance = self._get_client(project_id=project_id).instance(
          instance_id=instance_id
      )
      if not instance.exists():
          return None
      return instance
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Callable, NamedTuple, Sequence
  from google.api_core.exceptions import AlreadyExists, GoogleAPICallError
  from google.cloud.spanner_v1.client import Client
  from sqlalchemy import create_engine
  from airflow.exceptions import AirflowException
  from airflow.providers.common.sql.hooks.sql import DbApiHook
  from airflow.providers.google.common.consts import CLIENT_INFO
  from airflow.providers.google.common.hooks.base_google import GoogleBaseHook, get_field
label_desc: Use image node_id 6 for calling the SpannerHook obj's underlying member method code with example usage: obj.get_instance(instance_id, project_id) and returns: instance, None