CheckReg TODO: remove this function to util.

该函数除了将yaml解析为wfs，还进行了全局参数替换操作.

由Map解析得到一个Wfs，该Map中的key需要是下划线格式.

IsEmptyResource return true when cpu or mem is nil.

将yaml解析为map.

ValidateResource validate resource info.

ValidateResourceItem check resource for cpu or memory.

ValidateScalarResourceInfo validate scalar resource info.

EnvJobModeCollective env.

EnvJobModePS env.

spark job env.

job priority.

EnvJobWorkDir The working directory of the job, `null` means command without a working directory.

EnvJobYamlPath Additional configuration for a specific job.

ENVK3SNodeName makesure schedule without volcano.

EnvPaddleParaJob defines env for Paddle Para Job.

RayJob keywords.

JobKindGroupVersionAnnotation KindGroupVersion for job, format: {kind}.{group}/{version}.

JobOwnerLabel the key of job label oor annotations.

PaddleParaVolumeName defines config for Paddle Para Pod.

priority class.

TODO move to framework.

ElasticQueueKindGroupVersion kind group version for elastic queue.

StandaloneKindGroupVersion kind group version for single job.

WorkflowKindGroupVersion kind group version for argo workflow job.

ClientOptions used to build rest config.

FileSystem indicate PaddleFlow.

Flavour is a set of resources that can be used to run a job.

JobView is view of job info responded to user, while Job is for pipeline and job engine to process.

MixedLogRequest can request job log or k8s pod/deploy events and log.

ResourceInfo is a struct that contains the information of a resource.

Component包括Dag和Step，有Struct WorkflowSourceStep 和 WorkflowSourceDag实现了该接口.

ResourceName is the name identifying various resources in a ResourceList.

RuntimeView is view of run responded to user, while workflowRuntime is for pipeline engine to process.

ScalarResourcesType is the type of scalar resources.