code: public static RuntimeAssertion RuntimeAssertion(Throwable cause,
              String pattern, Object... parameters) {
          return strip(new RuntimeAssertion(String.format(pattern, parameters),
                  cause));
      }
docs: Generate a {@link RuntimeAssertion}
  
  @param cause
  Existing {@link Throwable} to wrap in a new
  {@code IllegalArgumentException}
  @param pattern
  {@link String#format(String, Object...) String.format()}
  pattern
  @param parameters
  {@code String.format()} parameters
  @return A new {@code IllegalArgumentException}