ITextFileBufferManager.getFileStoreTextFileBuffer(
IFileStore fileStore)
Returns the text file buffer managed for the given file store
or null if there is no such text file buffer.
ITextFileBufferManager.getTextFileBuffer(
IDocument document)
Returns the text file buffer managed for the given document
or null if there is no such text file buffer.
ITextFileBufferManager.getTextFileBuffer(
IPath location,
LocationKind locationKind)
Returns the text file buffer managed for the file at the given location
or null if there is no such text file buffer.