abstract fun getProperty(node: Node<T>!, mol: Molecule!, prop: String!): Double
Given an Node, an Molecule and a property expressed as a String, returns a numeric value. If a numeric value is not deducible, Double.NaN is returned.
node - Node<T>!: the node
mol - Molecule!: the molecule to analyze
prop - String!: the property to extract
Return
Double: a numeric value representing the property