code: @SuppressWarnings("unchecked")
  	@Override
  	public T where(final CharSequence rawString) {
  		this.rawStrings.add(rawString);
  		this.useOperator = true;
  		return (T) this;
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.fluent.ExtractionCondition#where(java.lang.CharSequence)