### Question:
DiagramStyles { public static String escapeClassName(String input) { Objects.requireNonNull(input); String temp = input; if (temp.length() < 2) { temp = StringUtils.leftPad(temp, 2, "_"); } return escape(temp); } private  DiagramStyles(); static String escapeClassName(String input); static String escapeId(String input); static String unescapeId(String input); static String escape(String input); static String unescape(String input); static final String WIRE_STYLE_CLASS; static final String GRID_STYLE_CLASS; static final String BUS_STYLE_CLASS; static final String LABEL_STYLE_CLASS; static final String LINE_STYLE_CLASS; }### Answer:
@Test public void test2() { String input = "_c"; String escaped = DiagramStyles.escapeClassName(input); assertEquals("_95_c", escaped); }