A descriptor of the data being extracted from data input of type A
The actual function used to extract the data from type A.
The (optional) code implementation of the function
The (optional) code implementation of the function
A descriptor of the data being extracted from data input of type A
The actual function used to extract the data from type A.
An extractor function containing additional information about itself.
data type from which we would like to extract a value of type B
the type of data we want to extract from type A.
A descriptor of the data being extracted from data input of type A
The actual function used to extract the data from type A.
The (optional) code implementation of the function