code: def function_invocation(self, function_name, *args):
      functions_args = " ".join(map(lambda x: f"$({x})", args))
      return f"{function_name} {functions_args}"
  
file_path: m2cgen/m2cgen/interpreters/powershell/code_generator.py
imports: from contextlib import contextmanager
  from m2cgen.ast import CompOpType
  from m2cgen.interpreters.code_generator import CLikeCodeGenerator, CodeTemplate
label_desc: Use image node_id 3 for calling the PowershellCodeGenerator obj's underlying member method code with example usage: obj.function_invocation(function_name) and returns: function_name, str, functions_args