code: def inject_tracing_vars(env_dict: Dict[str, str]) -> Dict[str, str]:
      inject(env_dict)
      return env_dict
  
imports: import os
  import sys
  from opentelemetry.sdk.trace import TracerProvider
  from opentelemetry.sdk.trace.export import BatchSpanProcessor
  from opentelemetry.propagate import set_global_textmap
  from opentelemetry.sdk.resources import SERVICE_NAME, Resource
  from opentelemetry.trace.span import format_trace_id
  from opentelemetry.propagate import extract, inject
  from functools import wraps
  import contextlib
  from typing import Dict, List, Optional
  from opentelemetry import trace, context
  from .span_exporter import get_span_exporter
label_desc: Use image node_id 5 for calling a global function with example usage: inject_tracing_vars(env_dict) and returns: env_dict