copy of com.google.common.base.preconditions #checkstate . concode_field_sep String ENCODING_GZIP concode_elem_sep String CONTENT_LENGTH concode_elem_sep String CONTENT_ENCODING concode_elem_sep String RETRY_AFTER concode_elem_sep String ENCODING_DEFLATE concode_elem_sep Charset UTF_8 concode_elem_sep Charset ISO_8859_1 concode_elem_sep int BUF_SIZE concode_field_sep T checkNotNull concode_elem_sep Collection<T> valuesOrEmpty concode_elem_sep byte[] toByteArray concode_elem_sep T[] toArray concode_elem_sep String decodeOrDefault concode_elem_sep void checkArgument concode_elem_sep Type resolveLastTypeParameter concode_elem_sep String toString concode_elem_sep long copy concode_elem_sep String emptyToNull concode_elem_sep void ensureClosed
void function ( boolean arg0 , String arg1 , Object ... arg2 ) { if ( ! arg0 ) { throw new IllegalStateException ( format ( arg1 , arg2 ) ) ; } }