src/org/nutz/repo/org/objectweb/asm/commons/GeneratorAdapter.java
public void checkCast(final Type type) {
        if (!type.equals(OBJECT_TYPE)) {
            typeInsn(Opcodes.CHECKCAST, type);
        }
    }
public void checkCast(final Type type) {
        if (!type.equals(OBJECT_TYPE)) {
            typeInsn(Opcodes.CHECKCAST, type);
        }
    }
Generates the instruction to check that the top stack value is of the
given type.

@param type
a class or interface type.