title: How to get the return value in asm?
body: <p>I want to extract the return value that type is org.apache.commons.dbcp.BasicDataSource How can I achieve this in asm?</p>
  
  <p>I have to get the instance of the class, org.apache.commons.dbcp.BasicDataSource right after it is created in createDataSource(). So I will visit this method and put some bytecode for getting the return value. </p>