sql/src/main/java/org/opensearch/sql/sql/parser/AstExpressionBuilder.java [379:391]:
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  private List<UnresolvedExpression> relevanceArguments(RelevanceFunctionContext ctx) {
    // all the arguments are defaulted to string values
    // to skip environment resolving and function signature resolving
    ImmutableList.Builder<UnresolvedExpression> builder = ImmutableList.builder();
    builder.add(new UnresolvedArgument("field",
        new Literal(StringUtils.unquoteText(ctx.field.getText()), DataType.STRING)));
    builder.add(new UnresolvedArgument("query",
        new Literal(StringUtils.unquoteText(ctx.query.getText()), DataType.STRING)));
    ctx.relevanceArg().forEach(v -> builder.add(new UnresolvedArgument(
        v.relevanceArgName().getText().toLowerCase(), new Literal(StringUtils.unquoteText(
            v.relevanceArgValue().getText()), DataType.STRING))));
    return builder.build();
  }
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ppl/src/main/java/org/opensearch/sql/ppl/parser/AstExpressionBuilder.java [316:328]:
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  private List<UnresolvedExpression> relevanceArguments(RelevanceExpressionContext ctx) {
    // all the arguments are defaulted to string values
    // to skip environment resolving and function signature resolving
    ImmutableList.Builder<UnresolvedExpression> builder = ImmutableList.builder();
    builder.add(new UnresolvedArgument("field",
        new Literal(StringUtils.unquoteText(ctx.field.getText()), DataType.STRING)));
    builder.add(new UnresolvedArgument("query",
        new Literal(StringUtils.unquoteText(ctx.query.getText()), DataType.STRING)));
    ctx.relevanceArg().forEach(v -> builder.add(new UnresolvedArgument(
        v.relevanceArgName().getText().toLowerCase(), new Literal(StringUtils.unquoteText(
        v.relevanceArgValue().getText()), DataType.STRING))));
    return builder.build();
  }
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