Returns the value of the specified section property, or {@code null} if the section or property do not exist.
@param sectionName the name of the section to retrieve to acquire the property value
@param propertyName the name of the section property for which to return the value
@return the value of the specified section property, or {@code null} if the section or property do not exist.
Returns the value of the specified section property, or {@code null} if the section or property do not exist.
@param sectionName the name of the section to retrieve to acquire the property value @param propertyName the name of the section property for which to return the value @return the value of the specified section property, or {@code null} if the section or property do not exist.