PropertyNames

AST-children of CALL nodes have an argument index, that is used to match call-site arguments with callee parameters. Explicit parameters are numbered from 1 to N, while index 0 is reserved for implicit self / this parameter. CALLs without implicit parameter therefore have arguments starting with index 1. AST-children of BLOCK nodes may have an argument index as well; in this case, the last argument index determines the return expression of a BLOCK expression. If the PARAMETER_NAME field is set, then the ARGUMENT_INDEX field is ignored. It is suggested to set it to -1.

For calls involving named parameters, the ARGUMENT_NAME field holds the name of the parameter initialized by the expression. For all other calls, this field is unset.

This field holds the code snippet that the node represents.

This optional fields provides the column number of the program construct represented by the node.

This optional field provides the line number of the program construct represented by the node.

Name of represented object, e.g., method name (e.g. "run")

This integer indicates the position of the node among its siblings in the AST. The left-most child has an order of 0.