Fix usage snippet in ButterKnife Reflect README

[sewar]

Using Android Studio 3.2 and Gradle 4.10.3, properties.containsKey('android.injected.invoked.from.ide') is always false.

[JakeWharton]

Hmm I'll have to test. I'm pretty sure I was using 3.3 alphas when I wrote this.

[TWiStErRob]

I just spend 15 mins trying to figure out what's wrong as well. Because you're in a dependencies block Groovy is being clever. We need to prefix properties with project. to make sure we're accessing what we're interested in, or do as @sewar suggested.

If you paste the code from README to AS, sync, and navigate to the declaration of properties you'll see:

package org.codehaus.groovy.runtime;
public class DefaultGroovyMethods extends DefaultGroovyMethodsSupport {
    public static Map getProperties(Object self);
    public static MetaProperty hasProperty(Object self, String name);

i.e. the val Object.properties: Map<*, *> get() for Kotliners.

Note that even @sewar's suggestion wouldn't work without the project. prefix, because it would be trying to call the above hasProperty method which is a Groovy reflection method.

[dawidhyzy]

Any ideas on how to fix that?

[TWiStErRob]

@dawidhyzy it works if you use project.properties.... or project.hasProperty

[EesiLife]

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