How to get value of variable in javascript( FreeMaster)

[GZhao]

How obtain the value from variable (memory address) in object (Javascript:FreeMaster),  

const CamOffset__6th = {

    symbol: "CamOffsetsBuffered.CylinderTDCOffsetAngle", 

    variable: "CamOffsetsBuffered.CylinderTDCOffsetAngle[5]",

}

const test1 = CamOffset__6th.variable.toString;

                                   or 

                       CamOffset__6th.variable.valueof;

above it was not work