Provides communication between tabs.
        
        
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Methods
(static) execMaster(cmd, params)
    Execute command in master tab.
    Parameters:
| Name | Type | Description | 
|---|---|---|
| cmd | String | Command | 
| params | Array.<String> | List of parameters | 
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(static) execSlave(cmd, params)
    Execute command in all slave tabs.
    Parameters:
| Name | Type | Description | 
|---|---|---|
| cmd | String | Command | 
| params | Array.<String> | List of parameters | 
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