code: public T withProperty(String name, String value) {
  		this.envProperties.put(
  			notBlank(name, "name"),
  			notNull(value, "value")
  		);
  		return self();
  	}
docs: Add new property entry to the {@link #envProperties} map.
  
  @param name Property name.
  @param value Property value.
  @return this
  @throws NullPointerException If {@code name} or {@code value} are {@code null}.
  @throws IllegalArgumentException if {@code name} is empty or blank.