var scope and accessibility

    vars:
      tom: this is tom
    tasks:
    - name: task
      task:
      - func: cmd
        vars:
          jerry: this is jerry
        do:
        - name: print
          cmd: '{{.tom}}'
        - name: print
          cmd: '{{.jerry}}'
      - func: cmd
        do:
        - name: print
          cmd: '{{.jerry}}'
        - name: reg
          cmd:
            name: hitom
            desc: by default hitom is registered in to global context
            value: 'hello, {{.tom}}'
        - name: print
          cmd: '{{.hitom}}'
      - func: cmd
        do:
        - name: print
          desc: by default hitom is accessible from global context, that's why it is accessiable
            cross func
          cmd: '{{.hitom}}'
        - name: reg
          cmd:
            name: hijerry
            desc: hijerry is registered to local scope only
            value: 'hello, jerry'
          flags: [localOnly]
        - name: print
          desc: expecting to see its value since it is still in same func scope
          cmd: '{{.hijerry}}'
      - func: cmd
        do:
        - name: print
          desc: hijerry is not accessible here and got <no value>
          cmd: '{{.hijerry}}'
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0105
                 Verbose -> vvv
              ModuleName -> self
               ShellType -> /bin/sh
           MaxCallLayers -> 8
                 Timeout -> 3600000
     MaxModuelCallLayers -> 256
               EntryTask -> task
      ModRepoUsernameRef -> 
      ModRepoPasswordRef -> 
    work dir: /up_project/up
    -exec task: task
    loading [Task]:  ./tests/functests/c0105
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task:  ]
    -Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "tom": "this is tom",
      "up_runtime_task_layer_number": 0,
      "jerry": "this is jerry"
    })
    
    ~SubStep1: [print:  ]
    this is tom
    ~SubStep2: [print:  ]
    this is jerry
    -Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0,
      "tom": "this is tom"
    })
    
    ~SubStep1: [print:  ]
    None
    ~SubStep2: [reg:  ]
    ~SubStep3: [print:  ]
    hello, this is tom
    -Step3:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0,
      "tom": "this is tom",
      "hitom": "hello, this is tom"
    })
    
    ~SubStep1: [print: by default hitom is accessible from global context, that's why it is accessiable cross func ]
    hello, this is tom
    ~SubStep2: [reg:  ]
    ~SubStep3: [print: expecting to see its value since it is still in same func scope ]
    hello, jerry
    -Step4:
    self: final context exec vars:
    
    (*core.Cache)({
      "hitom": "hello, this is tom",
      "tom": "this is tom",
      "up_runtime_task_layer_number": 0
    })
    
    ~SubStep1: [print: hijerry is not accessible here and got <no value> ]
    None