var scope in callee

    vars:
      tom: this is tom
    tasks:
    - name: task
      task:
      - func: call
        do: sub1
      - func: cmd
        desc: |
          check if hitom is available in global context
          it should be <no value> as hitom in sub1 is marked localOnly
        do:
        - name: print
          cmd: '{{.hitom}}'
      - func: call
        do: sub2
      - func: cmd
        desc: |
          check if hitom is available in global context
          though hitom was regiser as global var, but it was registered to its own call stack
          however this is only available in its own call stack global but not return and available to its parent var scope
        do:
        - name: print
          cmd: '{{.hitom}}'
    - name: sub1
      task:
      - func: cmd
        do:
        - name: reg
          cmd:
            name: hitom
            desc: by default hitom is registered in to global context
            value: 'hello, {{.tom}}'
          flags: [localOnly]
        - name: print
          cmd: '{{.hitom}}'
      - func: cmd
        do:
        - name: print
          desc: should be <no value> since it is marked localOnly
          cmd: '{{.hitom}}'
    - name: sub2
      task:
      - func: cmd
        do:
        - 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
            however this is only available in its own call stack global but not return and available to its parent var scope
          cmd: '{{.hitom}}'
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0106
                 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/c0106
    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
    })
    
    =Task2: [task ==> sub1:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "tom": "this is tom",
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [reg:  ]
    ~~SubStep2: [print:  ]
    hello, this is tom
    --Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "tom": "this is tom"
    })
    
    ~~SubStep1: [print: should be <no value> since it is marked localOnly ]
    None
    -Step2: [
    check if hitom is available in global context
    it should be <no value> as hitom in sub1 is marked localOnly
    ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "tom": "this is tom"
    })
    
    ~SubStep1: [print:  ]
    None
    -Step3:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "tom": "this is tom"
    })
    
    =Task3: [task ==> sub2:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "tom": "this is tom",
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [reg:  ]
    ~~SubStep2: [print:  ]
    hello, this is tom
    --Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "hitom": "hello, this is tom",
      "tom": "this is tom"
    })
    
    ~~SubStep1: [print: by default hitom is accessible from global context, that's why it is accessiable cross func
    however this is only available in its own call stack global but not return and available to its parent var scope
     ]
    hello, this is tom
    -Step4: [
    check if hitom is available in global context
    though hitom was regiser as global var, but it was registered to its own call stack
    however this is only available in its own call stack global but not return and available to its parent var scope
    ]
    self: final context exec vars:
    
    (*core.Cache)({
      "tom": "this is tom",
      "up_runtime_task_layer_number": 1
    })
    
    ~SubStep1: [print:  ]
    None