There's any way to check if some part of the code is an abbreviated command?

Studio has a feature to expand / compress ObjectScript Commands
Advanced Editing
this might be a starting point.

@Igor Barboza 
You can use %Library.SyntaxColor to parse ObjectScript. Here's some code to get you started:

ClassMethod WriteAllCommands()
{
    Set syn = ##class(%SyntaxColor).%New(), in = ##class(%Stream.TmpCharacter).%New(), out = ##class(%Stream.TmpCharacter).%New()
    #; TODO Put your document's contents into "in"Do syn.Color(in,out,"COS"/* or "INT" or "CLS" */,"KE"/* K means JSON output, E means keep empty lines */)
    #; Format of the JSON output:
    #; [
    #;     #; One array for each source line
    #;     [
    #;         {
    #;             #; Language of the token. See Languages() in %Library.SyntaxColor.
    #;             "l": %Integer,
    #;             #; Attribute of the token. See Attributes() in %Library.SyntaxColor.
    #;             "s": %Integer,
    #;             #; Zero-indexed start position of the token on the line
    #;             "p": %Integer,
    #;             #; Length of the token in characters
    #;             "c": %Integer
    #;         }
    #;     ]
    #; ]Set json = ##class(%DynamicArray).%FromJSON(out), lineIter = json.%GetIterator()
    While lineIter.%GetNext(.lineNum,.lineTokens) {
        Set tokensIter = lineTokens.%GetIterator()
        While tokensIter.%GetNext(,.token) {
            If (
                #; COS
                (token.l = 1) && (
                    #; Command
                    (token.s = 32) ||
                    #; User-defined Z command 
                    (token.s = 52)
                )
            ) {
                Write"Command starting in column ",token.p + 1," of line ",lineNum + 1,!
            }
        }
    }
}