class_docstr: A FIFO queue for the steps to build.
class_docstr_tok: ["A","FIFO","queue","for","the","steps","to","build","."]
docstr: Initialize a _BuildQueue.
docstr_tok: ["Initialize","a","_BuildQueue","."]
code: def __init__(self):
      """Initialize a _BuildQueue."""
      self._steps_to_build = list()
  
imports: from __future__ import absolute_import
  import logging
  import secrets
  from typing import Sequence, Union, List
  from sagemaker.workflow.entities import RequestType
  from sagemaker.workflow.function_step import _FunctionStep
  from sagemaker.workflow.steps import Step, StepTypeEnum, PropertyFile
  from sagemaker.workflow.condition_step import ConditionStep
  from sagemaker.workflow.step_collections import StepCollection
  from sagemaker.workflow.step_outputs import get_step
  from sagemaker.workflow.pipeline_definition_config import PipelineDefinitionConfig
  from sagemaker.workflow.step_outputs import StepOutput
  from sagemaker.workflow.utilities import step_compilation_context_manager, get_config_hash, get_code_hash
  from sagemaker.utils import sagemaker_timestamp
label_desc: Use image node_id 1 to create a new _BuildQueue object  with example: obj = _BuildQueue()