code: function addParamsToData(IOD, IODOpts, form) {
  	form.append('apiKey', IOD.apiKey)
  
  	_.each(exports.prepareParams(IODOpts.params), function(paramVal, paramName) {
  		_.each(T.maybeToArray(paramVal), function(val) {
  			form.append(paramName, val)
  		})
  	})
  }
docs: Add parameters to FormData object.
  Automatically append api key.
  
  Modifies `IODOpts` in place.
  
  @param {IOD} IOD - IOD object
  @param {Object} IODOpts - IOD options
  @param {FormData} form - FormData object