@Test
void check_error_TSTypeVarOnlyOn() {

    t=testee.parse("List<T> -> List<T>");
    assertEquals(t.value().toString(),"TypeMappingExpression{typeVariables=[T], names=[List], tsExpressionElements=[TSMappedTerminal{value=List}, TSMappedTypeContainer{expressions=[TSMappedTerminal{value=<}, TSMappedTypeVar{value=T}, TSMappedTerminal{value=>}], value=<T>}], conversionCoverage=SUBTYPES}");
}