@PublicEvolving public interface Expression
Expressions represent a logical tree for producing a computation result. Every expression consists of zero, one, or more subexpressions. Expressions might be literal values, function calls, or field references.
Expressions are part of the API. They might be transformed multiple times within the API stack
until they are fully
ResolvedExpressions. Value types and output types are expressed as
<R> R accept(ExpressionVisitor<R> visitor)
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