Method
clear
重置缓冲区状态标志位：position设置为0，limit设置为capacity的值，所有mark无效。 注：缓冲区原来的内容还在，并没有清除。 @param buffer 字节缓冲区
(ByteBuffer buffer)
Source from the content-addressed store, hash-verified
source not stored for this graph (policy: none)
Tested by
no test coverage detected