pub type jvmtiExtensionFunction = Option<unsafe extern "C" fn(jvmti_env: *mut jvmtiEnv, ...) -> jvmtiError>;
pub enum jvmtiExtensionFunction { None, Some(unsafe extern "C" fn(*mut *const jvmtiInterface_1_, ...) -> u32), }
No value.
Some value of type T.
T