question: public boolean hasAndroidPlugin ( ) { List < String > plugins = getPlugins ( ) ; return plugins . contains ( GradleDetector . APP_PLUGIN_ID ) || plugins . contains ( GradleDetector . OLD_APP_PLUGIN_ID ) || plugins . contains ( GradleDetector . LIB_PLUGIN_ID ) || plugins . contains ( GradleDetector . OLD_LIB_PLUGIN_ID ) ; }
target:  Returns true if the build file uses the android or android-library plugin.