Import functions in Matlab for every local function

I have an m-file with a couple of tests defined as local functions. They are called from the main function:

function tests = main_function_test()
    tests = functiontests(localfunctions);
end

I am doing assertions with some tolerance, so I need to import in each local function:

import matlab.unittest.constraints.IsEqualTo;
import matlab.unittest.constraints.AbsoluteTolerance;

in order to make assertions of the form:

verifyThat(testCase, actual, IsEqualTo(expected, ...
        'Within', AbsoluteTolerance(0.00001)));

Is it possible to import those functions just once so they can be reused in each local function?