How to use

setRightMargin

method

in

com.intellij.psi.codeStyle.CodeStyleSettings

public void testInterpolationCompact() {
  myFixture.configureByFile("interpolation_compact_before.ex");
  temporaryCodeStyleSettings.setRightMargin(ElixirLanguage.INSTANCE, 120);
  reformatFixture();
  myFixture.checkResultByFile("interpolation_compact_after.ex");
}

  @Override
  public void importTo(@NotNull final CodeStyleSettings settings) {
    settings.setRightMargin(JavaLanguage.INSTANCE, maxColumns);
  }
}