I don't understand why I am getting 'Cannot find symbol' error on files that have been excluded from the build path.
All references to any of the classes or methods of excluded classes have been commented out. No errors or significant warnings:
List of problems/warnings: 
Project build exclusion:
Compilation output:
[ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[54,32] error: cannot find symbol [ERROR] symbol: method getTableByID(UUID) location: variable ddrInterface of type DomainInterfaceImpl C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[128,43] error: cannot find symbol [ERROR] symbol: method getSourceDDRColumn() location: variable datapointSource of type DatapointSource C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[147,67] error: cannot find symbol [ERROR] symbol: method getArithmeticDatapoints() location: variable datapointSource of type DatapointSource C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[151,68] error: cannot find symbol [ERROR] symbol: method getSourceDDRColumn() location: class DatapointSource C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[152,64] error: cannot find symbol [INFO] 5 errors [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.489 s [INFO] Finished at: 2021-03-29T11:33:41-04:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project ingest: Compilation failure: Compilation failure: [ERROR] C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[54,32] error: cannot find symbol [ERROR] symbol: method getTableByID(UUID) [ERROR] location: variable ddrInterface of type DomainInterfaceImpl [ERROR] C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[128,43] error: cannot find symbol [ERROR] symbol: method getSourceDDRColumn() [ERROR] location: variable datapointSource of type DatapointSource [ERROR] C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[147,67] error: cannot find symbol [ERROR] symbol: method getArithmeticDatapoints() [ERROR] location: variable datapointSource of type DatapointSource [ERROR] C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[151,68] error: cannot find symbol [ERROR] symbol: method getSourceDDRColumn() [ERROR] location: class DatapointSource [ERROR] C:\Users\dorr\git\ddr-ingest\src\main\java\com\biogen\ddr\ingest\model\TableBuilderInstruction.java:[152,64] error: cannot find symbol [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException 
