public Set<String> getPluginsThatSupportsGetUserRoles() {
        return getPluginsWithCapabilities(Capabilities::canGetUserRoles);
    }
@Test
    public void shouldGetPluginsThatSupportsGetUserRolesCall() {
        when(plugin1.getCapabilities().canGetUserRoles()).thenReturn(true);
        Set<String> pluginsThatSupportsGetUserRoles = store.getPluginsThatSupportsGetUserRoles();
        assertThat(pluginsThatSupportsGetUserRoles.size(), is(1));
        assertThat(pluginsThatSupportsGetUserRoles, contains(plugin1.getDescriptor().id()));
    }