docs: function(erc20Address, senderAddr, senderPassphrase, recipient, amountInWei) {
  
      const BrandedTokenKlass = require(rootPrefix + '/lib/contract_interact/branded_token')
        , brandedToken = new BrandedTokenKlass({ERC20: erc20Address})
      ;
  
      return brandedToken.transfer(senderAddr, senderPassphrase, recipient, amountInWei)
    }