code: @Override
  	public String put(final String key, final String value) {
  		return propsMap.put(key, value);
  	}
docs: Sets the property with the specified key.
  
  @param key
  The key (may not be {@code null})
  @param value
  The value (may not be {@code null})
  @return The previous value of the property, or {@code null} if it did not have one