* Copyright (C) 2007 The Guava Authors
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
class provides common functions and related utilites.
See the Guava User Guide article on.
input. This method is generally expected, but not absolutely required, to have the following properties:
(a, b)implies that
inputis null and this function does not accept null arguments
Most implementations will have no reason to override the behavior of
However, an implementation may also choose to return
object is a
that it considers interchangeable with this one. "Interchangeable"
typically means that
Objects.equal(this.apply(f), that.apply(f)) is true for all
f of type
F. Note that a
false result from this method does not imply
that the functions are known not to be interchangeable.