core/src/main/java/org/apache/commons/vfs2/provider/AbstractFileProvider.java
/**
     * Locates a cached file system
     *
     * @return The provider, or null if it is not cached.
     */
Locates a cached file system
@return The provider, or null if it is not cached.
Locates a cached file system @return The provider or null if it is not cached .
protected FileSystem findFileSystem(final Comparable<?> key, final FileSystemOptions fileSystemProps)
    {
        FileSystemKey treeKey = new FileSystemKey(key, fileSystemProps);
        synchronized (this)
        {
            return fileSystems.get(treeKey);
        }
    }
protected FileSystem findFileSystem ( final Comparable < ? > key , final FileSystemOptions fileSystemProps ) { FileSystemKey treeKey = new FileSystemKey ( key , fileSystemProps ) ; synchronized ( this ) { return fileSystems . get ( treeKey ) ; } }
Locates a cached file system
 @return The provider, or null if it is not cached.
Locates a cached file system @return The provider or null if it is not cached .