https://openjdk.java.net/ 
public interface sun.security.provider.EntropySource
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.security.provider.EntropySource
  super_class: java.lang.Object
{
  public abstract byte[] getEntropy(int, int, int, boolean);
    descriptor: (IIIZ)[B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
            Name  Flags
      minEntropy  
      minLength   
      maxLength   
      pr          
}
SourceFile: "EntropySource.java"