https://source.android.com/ 
public interface android.os.storage.StorageManagerInternal$ExternalStorageMountPolicy
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.os.storage.StorageManagerInternal$ExternalStorageMountPolicy
  super_class: java.lang.Object
{
  public abstract int getMountMode(int, java.lang.String);
    descriptor: (ILjava/lang/String;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
             Name  Flags
      uid          
      packageName  

  public abstract boolean hasExternalStorage(int, java.lang.String);
    descriptor: (ILjava/lang/String;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
             Name  Flags
      uid          
      packageName  
}
SourceFile: "StorageManagerInternal.java"
NestHost: android.os.storage.StorageManagerInternal
InnerClasses:
  public abstract ExternalStorageMountPolicy = android.os.storage.StorageManagerInternal$ExternalStorageMountPolicy of android.os.storage.StorageManagerInternal