Add support for chain completions on variables

[gayanper]

Today in breakpoint conditions and debug console you could complete current visible variable. But trying access methods and properties of a variable object doesn't provide completions.

ex: args. will not provide length as a completion in the main method breakpoint.

[gayanper]

@testforstephen Do you see a possibility we could achieve with the LSP ?

[testforstephen]

It looks like a bug in debugger. The completion is implemented by debugger itself.

java-debug/com.microsoft.java.debug.plugin/src/main/java/com/microsoft/java/debug/plugin/internal/CompletionsProvider.java

Line 73 in 57a98e2

type.codeComplete(snippet.toCharArray(), offset, position, null, null, null, frame.location().method().isStatic(), collector);