public boolean isArray() {
    return (descriptor.charAt(0) == '[');
  }
Gets whether this type is an array type. If this method returns {@code true}, then it is safe
to use {@link #getComponentType} to determine the component type.

@return whether this type is an array type
android/android_framework/dex-maker/src/main/java/com/android/dx/rop/type/Type.java