question: public ByteBuffer createBuffer ( Map < String , Object > parameters ) { ByteBuffer buffer = createByteBuffer ( ) ; for ( Field field : fields ) { log . trace ( "Before write ByteBuffer.position={}" , buffer . position ( ) ) ; field . write ( resolveInputValue ( parameters , field ) , buffer ) ; log . trace ( "After write ByteBuffer.position={}" , buffer . position ( ) ) ; } buffer . flip ( ) ; return buffer ; }
target:  Initializes a ByteBuffer and sets value of matching fields for use as  input to a function call (Work Area One).